The beautiful mom of two celebrated with her kids, family and boyfriend Casper Smart, who sent her a sweet Tweet on her special day.
Lopez reportedly had an early party at her pad in the Hamptons with family-friendly entertainment for the entire family including trampolines, moon walks and water balloons and sack races.
Celebrity chef Janet O’Brien was hired to cater the event.
Jennifer has made her mark in music, movies and fashion and beauty industries since her start as an “In Living Color” fly girl.
Smart, 26, and Lopez have been dating since 2011 following the singer’s divorce from husband Marc Anthony.
See some of J-Lo’s sexiest photos here.