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.''