Jennifer Lopez enjoyed a surprise belated birthday party at the weekend.
The 'Dance Again' hitmaker - who split from boyfriend Casper Smart after three years together in June - was close to tears when she arrived at a private estate in Calabasas, California, on Saturday (09.08.14) to be greeted by 150 friends.
A source said: "She looked ecstatic and surprised and really happy.
"You could tell she was touched. She was almost crying.
"You would have never thought she had just recently had a split. She was out having fun with her good friends."
As well as cake and dancing, the 'American Idol' judge was also treated to a short film called 'A.K.A. The Movie (No More Worries)', a personal video of memories from the singer's most recent tour.
The source added to E! News: "When she watched the film, she was laughing, very giddy and screaming about it with her friends.
"She looked fabulous. She spent the night hanging out and enjoyed seeing her friends."
Jennifer turned 45 on July 24, and celebrated with a group of friends including rumoured new love interest Maksim Chmerkovskiy, manager Benny Medina, Khloé Kardashian and boyfriend French Montana, Scott Disick, Leah Remini, Kelly Ripa and Andy Cohen.
A source said at the time: "No one danced more than Jennifer. She barely sat down all night! She was really tearing it up, dancing until the very end."

Simon Cowell has posted a picture of himself and his son wearing matching sunglasses.
The music mogul took to his Twitter account yesterday (13.08.14) to show that six-month-old Eric is already following in his fashion footsteps by wearing aviator-style shades.
Alongside the snap of him holding baby Eric as they both pose in their Ray Bans while soaking up the sun on what appears to be a luxury yacht, Simon wrote: "Taking after daddy (sic)."
The 54-year-old star welcomed his first child with girlfriend Lauren Silverman, 37, into the world on Valentine's Day (14.02.14) and has been posting a number of images of the adorable tot on the social networking site ever since.
Another photo - which was posted last month - saw the doting father bathing his son in an adult-sized bath while a picture taken in May saw Eric sat in his baby seat clutching a magazine and appearing to read it intently.
Simon wittily captioned the image: "Eric has already learnt to read!"
In addition to being a proud father, 'The X Factor' judge also uses his Twitter account to show off pictures of his beloved dogs, Squiddly and Diddly, with their most recent photo shoot taking place on a sandy beach in Miami, Florida.

BBC bosses have reportedly banned "token oldie" contestants from 'Strictly Come Dancing'.
Station executives are said to have told casting agents for the ballroom dance contest to only sign up celebrities with a "chance of winning" and, having seen the likes of Tony Jacklin, Paul Daniels, Johnny Ball and Edwina Currie fail to impress on the dancefloor, they have advised staying away from older stars.
A source told The Sun newspaper: "Bosses say signing so-called 'old duffers' is a waste of time because they never have a chance of winning. They are never very good.
"The critical detail now will be that each star on the dancefloor has a chance of actually winning the show."
Show bosses think a stronger line-up will make the show more competitive and attract higher viewing figures.
The source said: "It's not hard to see a pattern [with the older stars]. The thinking is that if there are no weak links in the line-up, it will make it more entertaining."
A BBC spokesman said: "We do not comment on speculation."
The Saturdays singer Frankie Sandford was announced yesterday (13.08.14) as the first celebrity taking part in this year's show.
Meanwhile, Artem Chingvintsev has announced he has landed a role as one of the 'Dancing with the Stars' professionals in the US after quitting 'Strictly' because of visa issues.

Guy Ritchie wants Jamie Dornan to take the lead role in his King Arthur film series.
The 'Snatch' director was "blown away" when he met the 32-year-old actor and is desperate to sign him up for his forthcoming set of blockbuster movies for Warner Bros., but it could prove difficult because of the hunky star's commitment to three 'Fifty Shades of Grey' movies.
A source said: "Jamie is hot property in Hollywood. Guy was completely blown away when he met him and wanted to offer the part immediately.
"Jamie is keen on the role, too, and his US agents are keen to work out a deal where he'll be able to do both franchises. They have to convince Universal to allow Jamie to make the film with Warner Brothers, which isn't looking promising."
Dornan is said to be particularly keen to land the role because he doesn't want to be typecast by 'Fifty Shades', in which he plays kinky businessman Christian Grey opposite Dakota Johnson as Anastasia Steele.
The source added to The Sun newspaper: "Jamie is keen to take on other roles and prove that he's an adaptable actor.
"He fears the huge 'Fifty Shades' franchise will be all he's associated with."
It was previously revealed Guy was close to casting Idris Elba in the first of his planned movie series, a reimagining of the story of King Arthur and his legendary knights of the kingdom of Camelot.

Nas worried that the untimely deaths of Notorious B.I.G and 2 Pac would spark the end of rap music.
The 'Hate Me Now' hitmaker - who has been involved in a long-running feud with fellow rapper Jay Z - thought the fatal shootings of Notorious B.I.G (Biggie) in 1997 and Tupuc Shakur in 1996 by rival gang members would mark the demise of the music genre.
He said in an interview with Zane Lowe for MTV Music: "We saw what happened with Biggie and the tragedies of Biggy and 2 Pac.
"Those two things hit me real hard. I knew them both of them - Biggy more but what they mean to the art form can never be replaced and when those two guys passed away I thought it was the end of rap."
However, the 40-year-old rapper believes the industry has now changed, with stars becoming more interested in making money to better one another.
He explained: "Today's music industry is a lot. You talk about it being a lot more about money. It's really about money now, and back then, during that period when you talk about me battling with J, it was about something else.
"It wasn't just about being the top guy in rap, it felt like we were leaders of nations, not that we were egos, egotistical as in I'm the leader, no not in that sense.
"What you felt surrounding us was there was an importance in what we were doing that mattered more than just success."
Meanwhile, NAS recently announced the dates for his 'Time is Illmatic' North American tour, which will coincide with the screening of his Tribeca film documentary 'Nas: Time is Illmatic'.
The tour will begin in Rochester, in New York on October 2 and close in Oakland, Ohio on October 19.
Nas' full interview with Zane will air this Sunday at 9.30pm on Relentless Ultra Presents Soundchain on MTV Music.

Aerosmith drummer Joey Kramer is suffering from heart complications.
The veteran rockers postponed a show in Concord, California last night (13.08.14) "due to illness" and it has now been claimed by gossip website TMZ that the 64-year-old musician - who has had heart problems in the past - is to undergo surgery for the unspecified complaint.
The Concord Pavilion announced the group were cancelling the show just hours before doors at the venue were due to open.
They wrote on their Facebook page: "Due to illness, Aerosmith has been forced to cancel tonight's performance at the Concord Pavilion in Concord, CA.
"The band regrets not being able to perform for their fans. Refunds will be available at point of purchase."
A spokesperson for the band didn't go into specific details about the late cancellation, saying only that they "apologise for the inconvenience".
It is as yet unclear whether the 'Crazy' hitmakers will complete their current US tour, but according to TMZ, members of the crew have already been told the next gig, in Washington on Saturday (16.08.14), won't be going ahead.

James 'Arg' Argent is going to be Mark Wright's wedding singer.
'The Only Way is Essex' star is gearing up to belt out of a few tunes when his best pal ties the knot to former 'Coronation Street' star Michelle Keegan next year, and Arg is equally looking forward to Mark's stag do.
He exclusively told BANG Showbiz: "I'm sure there will be an opportunity for me to sing a couple of songs at the wedding.
"The stag do is going to be some time next year but I'm not sure where it is going to be just yet. I'm sure it will be like a Marbella or a Vegas or something that."
But before Arg, 26, takes to the stage at Mark's wedding next year he is hoping he will have passed his driving test as he is currently undergoing an intensive driving course.
He added: "Lydia hasn't given me any more lessons but I'm getting proper lessons, I'm doing an intensive driving course. I can't wait to drive."
Meanwhile, Arg also sang at Mark's cousin Leah's wedding in Spain recently, causing a fight between her and Mark's sister Jess Wright and mother Carol Wright.

Helen Flanagan wishes she had a bigger bum.
The busty beauty enjoys exercising and is generally happy with her figure, but admits her least favourite body part is her derriere and she would love it if her posterior was given a bit of a boost.
She said: "I wish my bum was bigger. I'm very busty and I would like a bigger bum.
"I'm naturally very toned around my stomach. If I put weight on, it doesn't go on my stomach.
"I love exercise and it's something I genuinely do enjoy. I've got a trainer and I love being healthy.
"I exercise every day. My only downfall is chocolate."
The 24-year-old beauty insists she often has cravings for healthy food such as mangoes and even avoids purchasing calorific crisps.
She added to OK! magazine: "I have never been brought up on fish and chips or pies. My mum brought me up on a healthy diet.
"I really crave healthy food like mangoes or granola. Even with crisps, I buy the beetroot ones to make it a bit healthier."

Robin Williams reportedly fell off the wagon while making 'The Crazy Ones'.
The late 63-year-old actor - who got sober in 1983 before relapsing briefly in 2003 - stunned cast and crew members on the CBS show when he insisted on drinking real alcohol when filming a scene at Beverly Hills restaurant Spago last May.
A source told the New York Post newspaper's Page Six column: "Robin insisted on a real drink. No one had seen him drinking before this. One drink led to another, but it seemed to calm him down."
According to the insider, Robin - who checked into rehab in June to "maintain his sobriety" - was said to frequently infuriate his co-stars on the show because he often went off script, forcing the likes of Sarah Michelle Gellar to have to improvise their responses.
He also complained he "had a bad feeling" about the lack of chemistry on the set of the show, which was cancelled after just one season, and spent most of his downtime with his beloved Pug Leonard.
The source said: "He brought it everywhere with him. When he wasn't filming a scene, he was holding and petting and fawning over the dog."
It was recently revealed that Robin - who was found hanged at his California home on Monday (11.08.14) - had attended an Alcoholics Anonymous (AA) meeting shortly before he died.
Comedian and fellow AA member Argus Hamilton said: "He was at a meeting on Saturday. He had got out of rehab and was sober at the meeting."

Chris Brown has been praised by a judge for his good behaviour.
The 'Yeah 3x' hitmaker appeared in a Los Angeles court yesterday (13.08.14) for a progress report on his probation and the hearing was told all his random drug tests were negative and he had been attending bi-weekly therapy sessions.
As a result of his positive report, the judge agreed to a request from the 25-year-old singer's lawyer to have his drug testing reduced from three times a week to June.
While Chris - who was placed on probation for five years and sentenced to six months community service for assaulting then-girlfriend Rihanna in 2009 - hasn't spoken directly about his good report, he made fans aware of the situation.
He retweeted a post from CNN reporter Alan Duke which read: "Judge just praised @chrisbrown for a good probation report, noting he's tested negative on all drug tests since release from jail."
The 'Run It' star will next appear in court for a probation hearing on October 23 and his probation comes to an end in January 2015.
Chris - who was released from jail on June 2 after spending two months behind bars for allegedly making threats about using guns while seeking anger-management treatment in rehab - recently vowed to be a "real man" and learn from his past behaviour.
Posting a picture of himself in court wearing an orange jumpsuit, he wrote: "I been through a lot in my life. Made a lot of mistakes along the way. But through it all I've always been true to myself and through God I've been able to take care of my family! I should regret some things but I think the lessons learned will shape me into a real man. I'm grateful and appreciative! Thank you for life!"

'Guardians of the Galaxy' director James Gunn is already working on a sequel to the sci-fi film.
The first movie - starring Zoe Saldana, Bradley Cooper, Vin Diesel and Chris Pratt - opened in cinemas over the last couple of weeks, but Gunn is refusing to let the dust settle, revealing he has already developed a "basic story" for the sequel.
He told Empire: "I've thought a lot about where these characters are going and where they came from, things we've gotta find out. There has been a lot of world building we've done that we get to play with in the second movie.
"There have been a lot of documents passed around about who Peter Quill's father is, and things like that, between a select two or three of us. That's been part of the plan since the beginning, that's something I had to work out and I worked it out before we shot the screenplay."
Although Gunn, 44, admits the sequel is still in its infant stages, the director is excited by the creative process.
He added: "Sometimes you have ideas and you write them down and they're too convoluted on paper and it's too many ideas for one thing or it's not enough ideas or whatever and so that could easily change, but I know a lot about who these characters are and where they came from and where they're going."

Tara Reid won't rule out having more cosmetic surgery.
The 'Sharknado 2: The Second One' star previously underwent liposculpting to remove fat from her stomach but the procedure went wrong and she was left with scarring following corrective surgery.
Despite her bad experience, Tara - who also had a breast enlargement operation - would consider going under the knife again.
The 38-year-old actress said: "I can't say I'm never going to have more surgery as I don't know how I'll feel in a few years. Right now, I'm happy with my body, though.
"But the mental and physical pain I went through after I had the surgery was horrific. I went through two years of living in denial and everyone saying how bad my body was."
After shooting to fame in 1999 comedy film 'American Pie', Tara has attracted attention for her alleged party girl lifestyle, but is adamant she has a sensible attitude towards alcohol now.
She told Closer magazine: "I've had my fun but I still like to go out with my friends and have a drink. I don't need to be sober. I can have a glass of wine if I want one."