Cameron Diaz says producers did "the best they could" with her singing voice for 'Annie'.
The 41-year-old actress plays the cruel Miss Hannigan in the upcoming remake of the classic children's musical, but Cameron admits she was apprehensive to sing for the role as she isn't a naturally gifted warbler.
Appearing on 'Chelsea Lately', she said: "With 'Annie', we did the best we could."
However, despite her worries the blonde beauty believes she gave an adequate performance in her musical number.
She added: "I think we got to my optimum which is different to other people - yeah, we tried."
The movie, produced by rap mega-star Jay Z and A-list actor Will Smith, will star Quvenzhane Wallis in the lead role of Annie. Jamie Foxx and Rose Byrne are also part of the star-studded cast.
Jay will provide the score for the movie and admits the story of the red-headed orphan resonated with him as a youngster.
He previously said: "When the TV version [of 'Annie'] came on, I was drawn to it. It was the struggle of this poor kid in this environment and how her life changed - it immediately resonated."

Bear Grylls has recorded a cameo appearance in 'Planes 2: Fire & Rescue'.
The adventurer has lent his voice to the character of Avalanche, a smoke jumper, in the big Disney summer movie.
Bear had great fun taking himself outside of his comfort zone, saying: "It was a huge honour having Disney ask me to do it, I have been a huge Disney fan as a kid and I am now a renewed Disney fan as I have got three young boys who all love it."
The movie focuses on a crew of elite firefighting aircraft who are devoted to protecting the historic Piston Peak National Park from wildfire.
The story comes alive when Dusty (voiced by Dane Cook) - a world renowned air racer - learns that his engine is damaged and he may never race again.
Dusty then turns his attention to the world of aerial firefighting, where he and his friends discover what it takes to become a true hero.
The list of notable people who have lent their voices to the flick also includes Ed Harris and Julie Bowen, who is perhaps best known for playing Claire Dunphy on the sitcom 'Modern Family'.
'Planes 2: Fire & Rescue' follows last year's hit movie 'Planes' which grossed over $200 million worldwide.

Kourtney and Khloe Kardashian are being targeted by Hamptons residents who want them out of the neighbourhood.
The reality TV sisters - who are in the sunny New York suburb filming new show 'Kourtney and Khloe Take The Hamptons' - have had their faces plastered on anti-Kardashian stickers in a grass-roots effort to get them to move, according to TMZ.
Placed on public signs around the Hamptons, the stickers show Kourtney and Khloe's faces along with the hashtag #NODASH, in reference to their DASH fashion stores.
The sisters are opening a new outlet in the Hamptons but their entrepreneurial plan hasn't gone down well with locals.
However, earlier this year Hamptons mayor Mike Epley claimed he had no problem with the duo opening a pop-up store in the town, but insisted he wished producers of their reality show had informed him of the decision ahead of time.
Mr. Epley went on to admit the store would provide a huge financial boost to the area.
Meanwhile, Kourtney, 34, and Khloe, 30, recently tipped Kourtney's four-year-old son Mason for a future career as a model.
Pregnant Kourtney said: "He has such an attitude."
Khloe added: "He's very moody. He's very Kourtney-like. If he wants to do something, he will. If he doesn't, you can't get him to do anything."

Sam Smith has gone on a carbohydrate-free diet.
The 'Stay With Me' hitmaker is reportedly eager to stay in shape as he performs at various festivals around the globe this summer and has requested he be served up healthy meals on his rider.
A source said: "Sam surprised bosses at a recent festival when he put 20 chicken wings on his rider and announced he's gone carb-free.
"It seems he is keeping up the healthy regime as he's apparently asking Virgin Media's Louder Lounge chefs to cook him up a variety of protein-only dishes to enjoy before his performance at V Festival next month."
The 22-year-old singer is riding high in the charts in both the UK and the US, where his debut album 'In the Lonely Hour' sold over 160,000 copies in its first week of sale.
Sam has even developed a strong celebrity fan base as singer Nicole Scherzinger recently revealed his album left her in tears.
She said: "He did a spectacular job of cutting straight to the heartstrings. I had many dates with the album on and a glass of wine."

Scott Disick is "doing great" after suffering from alcohol poisoning last month.
The 'Keeping Up with the Kardashians' star - the long-time partner of Kourtney Kardashian - is said to be on the mend following news that he was treated at Southampton Hospital in New York after a night of heavy drinking on June 22.
Scott, 31, lost both of his parents this year and it's thought his excessive night of boozing stems from the difficult period he's had.
However, pals close to the star say that after a rollercoaster time in his life, Scott is on the up.
A source told PEOPLE.com: "He's had an unimaginable year losing his parents.
"There have been highs and lows, and he's just doing his best trying to work through everything. He's really making progress."
Scott is currently preparing for the birth of his third child with Kourtney, with whom he already has daughter Penelope, two, and son Mason, four.
Kourtney has been busy shooting her latest reality show, 'Kourtney & Khloe Take The Hamptons', but will be relieved to learn that her beau is getting himself together following a turbulent 12 months.
The couple began dating prior to 'Keeping Up With the Kardashians' and have had an on/off relationship over the years.
But despite Scott's recent troubles, they appear to be as strong as ever and are looking forward to the birth of their new baby.

Dean McDermott is working "hard" to fix his marriage with Tori Spelling.
The couple have endured their fair share of drama recently, after it was revealed that the actor had cheated on his wife of eight years and entered into rehab to be treated for alcoholism.
Now Dean has opened up about his relationship and assured fans that they are getting "stronger".
Talking to Giuliana Rancic on E! News, he explained: "Things are great. Our relationship is stronger than it's ever been and we're working very hard on that.
"I'm working very hard on myself - my sobriety, it means everything to me, becoming the dad and the husband that I've always wanted to be and that they deserve ... I'm changing my life for the good."
Dean - who has four children with Tori - also revealed his disbelief that his wife is still with him.
He reflected: "I wake up every morning and I'm just so blessed that she's in my life still. She's such a strong lady, and when this happened I was like, 'Why don't you just leave me?' "
The 47-year-old actor is currently starring alongside Tori in reality show 'True Tori' and according to Dean, the 41-year-old actress couldn't turn off her feelings for her husband despite his infidelity.
He recalled: "She's like, 'Well, I love you, I can't just turn that off. I'm mad at you, I'm really upset, I'm really hurt - but I love you. That just doesn't go away.'
"'We're trying to show people that if that love is still there, love can conquer all and love does conquer all. It's just going to take a lot of work and a lot of tears and a lot of pain."

Andrew Garfield and Emma Stone were all loved up as they posed together at the New York premiere of 'Magic In The Moonlight'. Andrew looked smart in a grey suit and put a protective arm around his girlfriend, who was wearing a pretty floral dress.

Miranda Kerr looked stunning as she stepped out in New York City. The model teamed a gorgeous floral calf-length skirt with a black vest and heels.

Reese Witherspoon was all smiles as she left a hair salon in Beverly Hills. The pretty blonde actress wore a co-coordinating white top and skirt, teamed with a pair of retro sunglasses.

Cara Delvingne opted for a casual look as she boarded a flight out of New York City. The model walked through the terminal wearing a black leather jacket and grey jogging pants whilst chatting on the phone.

Britney Spears went for a morning workout with her mother, Linda, in Los Angeles. The 'Work B*tch' singer was spotted hitting the gym in a pair of coral shorts and a pink vest.

Ryan Reynolds looked every inch the Hollywood hunk in a grey suit and tie as he filmed scenes for his new movie 'Woman In Gold' in Los Angeles.