Cameron Diaz feels more comfortable taking her clothes off on camera than singing.
The 42-year-old actress sings in new movie musical 'Annie' - which also stars Oscar winner Jamie Foxx, 46 - and she admits singing on set fills her with dread.
Cameron revealed: "It was the most terrifying thing I've done in a movie."
Cameron compared her singing trauma to taking her clothes off in the comedy sitcom 'Sex Tape', in which she appeared alongside Jason Segel.
A scene in the film sees Cameron wearing a pair of roller skates trying to have sex with her husband.
She added: "I am comfortable just being who I am."
By contrast, Cameron's 'Sex Tape' co-star Jason recently revealed that his mother hated his nude scene in 'Forgetting Sarah Marshall'.
Jason, 34, played Peter Bretter in the 2008 rom-com and explained that has his mother failed to laugh when she first watched the scene where Jason gets naked in front of co-star Kristen Bell.
He told the Guardian newspaper: "Poor mum, I really misjudged that. I thought we had this connection. I thought she would find the surprise of it funny. But she really did not."

A slice of Britain's Duke and Duchess of Cambridge's wedding cake is up for sale.
Julien's Auctions in Beverly Hills, California will auction off the slice of fruit cake, which was given to guests at the wedding of Prince William and Duchess Catherine, after an invitee sold it to them.
The cake featured eight tears, took the baker five weeks to make and is said to have peaked in flavour 13 months after being made, comes in a royal red tin along with a blank invitation to the wedding presented on the Queen's stationary.
The auction house has predicted a selling price of between $1,000 and $2,000 after selling a slice of cake from the wedding of Prince William's parents - Prince Charles and the late Princess Diana - for over $6,000, 27 years after it was baked.
The sale is set to take place this afternoon (05.12.14) with five of Diana's dresses - which are expected to sell for a whopping $60,000 to $100,000 - also featuring in the auction.
Julien's executive director Martin Nolan claims Diana sold the dresses in question at an auction in 1997, just months before she was killed in a car accident.
The blonde beauty was persuaded by her son William to sell the gowns, claiming she could give the $5,000 to $18,000 proceeds to charity.
Nolan believes the dresses - which can be bought at the auction house or on their website - will be snapped up by a museum.
He told CNN: "People still have a love affair with Diana, so they know these dresses will bring people through museum doors."

Kelly Brook turned down a role in 'EastEnders'.
The 'Piranha 3D' actress has revealed she met with producers of the BBC One soap but decided she wanted to see if she could make it across the pond in the United States first.
She said: "I was approached by 'EastEnders' a while ago, but I wanted to go to American first and try other things.
"They were creating roles, so it was a general chat about what kind of role I could do on the show, it was a good discussion.
"I could see myself as a barmaid in the Queen Vic, I'd love it, I think it would be so much fun."
The brunette recently wrapped on comedian Ellen DeGeneres' new sitcom 'One Big Happy' and is hoping it will go further.
Kelly the Daily Mirror newspaper: "I think we're making something really special.
"We've done six episodes, but I hope it gets picked up for a full 24 episode season.
"It's nice to go away and work with different people. If it gets picked up I'll be there [in California] eight months of the year, but I'll always come back to Britain."

Mariah Carey has reportedly slammed production staff for leaking a recording of her vocals from her performance at the switching on of the Rockefeller Center Christmas tree lights.
The 'We Belong Together' hitmaker performed live at the event on Wednesday (03.12.14) after failing to show up to pre-record the day before and it's now been claimed she's blaming NBC employees for leaking a recording of her less than impressive vocals.
A source told the New York Daily News newspaper's Confidenti@l column: "It's really hard to leak 'just' audio. Mariah is blaming producers for leaking her audio track. She believes they did it to punish her for not showing up to taping the day before the live event!"
The 44-year-old star - who recently split from husband Nick Cannon, with whom she has three-year-old twins Moroccan and Monroe - left NBC staff and the audience waiting for three hours before failing to show up to the pre-record of her performance of 'All I Want For Christmas Is You'.
However, a representative for the blonde beauty insists she has no issue with the network's employees because, as she used a wireless microphone, anyone could jave recorded the isolated track.
They added: "She performed beautifully."

Alec Baldwin's wife wants another baby.
The former '30 Rock' star, who has 15-month-old daughter Carmen with Hilaria Baldwin, admits she is eager for them to expand their family in the near future.
Asked if they are planning to have more children, the 56-year-old actor said: "We'll see. Hilaria definitely thinks we should have one more, but we'll see what happens."
The 'Departed' star, who also has daughter Ireland, 19, with ex-wife Kim Basinger, says he has become a homebody since Carmen was born last year.
He said: "I choose to stay home with my wife and daughter. Going out - there's not a whole lot of that anymore."
But Alec misses having romantic dates with Hilaria, 30, which he says "have become tricky".
He added to Life & Style magazine: "Everything's about the baby."
The actor married the yoga instructor in June 2012 after meeting her in February 2011.
They moved in together in New York City after just six months of dating, but Hilaria previously admitted: "He didn't kiss me for six weeks! He shook my hand for six weeks. We'd have the most romantic dinner date, and afterward he'd drop me off at my house and shake my hand."

The Script pulled a woman from a car wreckage on Thursday (04.12.14).
The band were on their way to Key 103's Christmas Live Show in Manchester, north west England, when they sprung into action to help a female who was stuck in her vehicle after it hit a roadside barrier and flipped over on the M40 motorway.
Phoning local radio station Key 103 later in the day, the driver praised the group, saying: "I was hit on the side and it kept spinning round and round. Then they got me out of the car.
"I gave them a cuddle before I left but never said thank you."
The band - made up of Danny O'Donoghue, Mark Sheehan and Glen Power - later explained they ran to help the trapped motorist after ringing the emergency services, and branded the incident as "scary."
Danny said: "We called 911 then ran over to the car.
"She was trapped and saying she couldn't feel her legs, which was scary.
"But we managed to un-jam the door and get her out."
Despite the trio of hunks coming to the woman's rescue, the band admitted they found it funny she didn't recognise them until after the incident. Once the lads had taken her back to their van to wait for the emergency services to arrive, she realised who her saviours were and couldn't contain her excitement.
Danny added: "We were sat there and suddenly she said, 'Oh my God, you're The Script!'
"Then she jumped out of the van. I was like, 'Sit down!' She's a big fan which is amazing."
Speaking to a fan on Twitter later in the day, the band explained the woman escaped unharmed but the same couldn't be said for her car.
They added: "we had to do it or it could have been v v bad. She's ok now and that's the main thing. Her car is totalled. M (sic)."

Miley Cyrus and Patrick Schwarzenegger partied until 6am in Miami.
The 'Wrecking Ball' singer and her new beau, who is the son of Hollywood legend Arnold Schwarzenegger, were spotted enjoying a wild night out at E11even - a 24 hour adult show club - following her gig at The Raleigh hotel in Miami, Florida, on Wednesday night (03.12.14).
According to the New York Post newspaper's Page Six column, the couple - who are thought to have been dating since October - joined the club's Michael Jackson impersonator on the stage and only left "when the sun was coming up on Thursday morning".
The 22-year-old singer arrived at the club sporting the silver wig she had worn in her show just hours earlier and was joined at the nightspot by actor Leonardo DiCaprio, who spent the night at the club's owner Dennis DeGori's table.
While Patrick is clearly enjoying spending time with the former Disney star, it was recently reported his mother, Maria Shriver, is "very worried" about how her son is being influenced by his new girlfriend.
It is thought Maria became concerned after viewing some photos of Miley on a bucking bronco shaped like a manhood at the beauty's 22nd birthday party last month.
A source explained: "The birthday party with all the penis pictures disgusted her. That was the worst thing Miley could have done.
"Maria is very, very worried about the influence Miley's having on Patrick. She fully believes that you become who you surround yourself with and she's always been so happy with the friends Patrick chooses, she never saw this coming."
However, Patrick is reportedly "falling hard" for his new beau and is hoping their relationship will develop into more.
An insider said: "He is definitely falling hard for her and she really is liking all the attention he is giving her.
"This is something that is going to last."

Khloe Kardashian and French Montana have split for a second time.
The 30-year-old reality star is said to have called time on her on/off romance with the rapper, who she split from in September after eight months of dating before reuniting in November, because she felt their relationship was getting "too serious" and it was too soon after her failed marriage with Lamar Odom.
A source told Us Weekly: "Khloe just wasn't ready after Lamar [Odom] and it was getting too serious.
"She respects and cares for him but just wasn't ready."
The pair's latest split comes after Khloe - who filed for divorce from Lamar in December 2013 amid allegations he had cheated on her and took drugs - and 30-year-old musician's September separation occurred for very similar reasons.
A source said at the time: "They are on a break. The relationship got too heavy and Khloe needed to take a step back."
Another insider added: "It grated on her that he became so dependent on her."
But they were thought to have reunited just last month as the pair were seen getting close again at his 30th birthday party in Los Angeles.
An onlooker said: "Khloe and French are clearly together - they were hugging, holding hands, and being openly affectionate."
Earlier in the day, Khloe had taken to her Instagram account to gush about her "baby boy" French and recall the "timeless memories" they have created.
Posting a picture of herself and French on a beach in partial silhouette, she wrote added the caption: "Happy birthday baby boy! In only a short amount of time we have created timeless memories,
"Happy birthday to a man who genuinely lives life to its fullest. 'What's understood doesn't need to be explained' @frenchmontana I can't wait to celebrate life with you tonight! You deserve it!! (sic)".
However, it is thought the relationship has come too soon for Khloe following her split from Lamar last year, and she sparked speculation she still holds a torch for the basketball player by appearing to reach out to her estranged husband by posting a heartfelt quote about closure on his birthday last month.
The quote read: "Closure: Like time suspended, a wound unmended - you and I. We had no ending, said no good-bye. For all my life, I'll wonder why."

Davina McCall says the cast of 'The Jump' is "amazing."
The reality show - which premiered in January 2014 - follows celebrities attempting to master a variety of winter sports, and host Davina claims the participants in the second series will be even better than those in the first.
Speaking at the 2014 Cosmpolitan Ultimate Women Awards, where she won the Ultimate Editor's Choice prize, in London on Wednesday (03.12.14), she said: "Oh my god, I am so excited! I got a list of all the names today, I can't tell you because I was told I would be shot, but it's amazing casting. A-mazing."
The show's first series featured former 'The Only Way Is Essex' star Amy Childs, presenter Anthea Turner, and cricketer Darren Gough, with singer Joe McElderry winning the competition.
Former England rugby player Mike Tindall - who is married to the Queen's granddaughter Zara Phillips - has already been confirmed for the second series which will begin next year, and the mother-of-three teased a line-up of equally high-profile stars.
Davina told BANG Showbiz: "One might be worried that we've already peaked [by announcing Mike Tindall] but we haven't. He's right up there with the rest of them, that's the kind of calibre we're talking about this year, and they want to come and injure themselves, it's amazing. It's going to be amazing."
The 47-year-old presenter also teased more extreme stunts for the upcoming episodes, admitting she was surprised when she heard about the sports which Channel 4 plan on airing live.
She said: "I was looking at some of the ideas for the show and I thought maybe they'd have toned it down a bit but they haven't. There is a horrific, horrific live event which will be happening live which is so scary. I looked at it today and I was like 'god no way!'"

Tessa Peake-Jones has seen her "gorgeous" 'Granchester' co-star's penis.
The 57-year-old actress got close and personal with James Norton on the set of hippie film 'Bonobo' as she admitting to seeing his private parts while filming.
Tessa - who rose to fame playing Raquel Turner in BBC sitcom 'Only Fools and Horses'- exclusively told BANG showbiz: "James is one of the commune members, so my first vision of him was doing yoga in the garden stark naked.
"It's about a commune in England, set today, run by a hippie person and they base themselves on the Bonobo tribe which are a tribe of monkeys who never fight, they are female led and they resolve everything through sex, touch and massage."
Tessa - who also stars alongside James in the hit ITV drama 'Grantchester' - described the experience as a "delight" due to the 29-year-old actor's good looks.
She said: "It was a delight for me having to film it- he was completely naked it was gorgeous what a job!"
The veteran actress admitted how she loved working with James and was full of praise for their 'Granchester' co-star Al Weaver, 33, explaining how they had "lots of laughs" and "wicked" moments in between filming.
She shared: "The joy was being in my 50s and spending most days with two absolutely gorgeous men, I had James Norton and Al Weaver what more could I want at 57 years old? We had a lot of laughs off-camera! They are naughty and wicked and funny and gorgeous all at the same time."
'Grantchester' is out on DVD now.

Chris Pratt is in talks to star in 'Magnificent Seven'. The 35-year-old actor is in early talks with MGM about taking on a leading role in the upcoming Antoine Fuqua remake of the 1960 western directed by John Sturges, Deadline reports. Pratt would ...

Labrinth's new album is "all about the vocals".
The 'Earthquake' hitmaker claims he's taken a step back from dance music and really worked at improving his voice for the tracks on his upcoming second album 'Take Me To The Truth'.
He said: "It's all about the vocals on the new songs. The first album didn't have as much depth as this record, because I was still learning and still trying to experiment with production and being inspired by club music.
"I feel like some of that essence got lost on the first album. This is completely different. I've worked so hard on my singing.
"It's all about me and my voice, which is bold. There have been nerves."
The 25-year-old star has already found success with the first two tracks from the record, 'Let It Be' and 'Jealous', but he admits he's more nervous performing live than ever before.
He told The Sun newspaper: "And playing live is intense. It's like not wearing any make-up. It feels like I'm singing, standing on stage in just my boxers, so it's great and liberating."
Labrinth - whose real name is Timothy McKenzie - also admitted to writing 'Jealous' about his father leaving his mother and their nine children.
He explained: "It was my perception of how my dad leaving my family affected us all ... I think it is one of the strongest songs because it made me have to take a bit of myself out and put it on a record and I've never really done that before."