Jennifer Lopez nearly wore her birthday suit during her birthday performance! The On the Floor singer took her Up All Night Tour to Warsaw, Poland on Friday, which also just so happened to mark her 56th birthday! In a video shared on her official YouTube account, the pop star comes out on stage in a matching gold bra, gloves, booties, and fringe skirt... The latter of which pops off and falls to the ground while she's being sung happy birthday! OMG! But don't worry, she had on matching gold "underwear.