Jennifer Lopez delivered an emotional, impromptu speech during her birthday concert at the Regnum Carya hotel in Antalya, Turkey, on Wednesday, July 23. Toward the end of her Up All Night show, Lopez's backup singers and dancers surprised the multihyphenate with an audience sing-along to "Happy Birthday,

Jennifer Lopez wore a sparkly, backless dress that plunged all the way down to her butt to celebrate her 56th birthday. See her party frock, here.

Jennifer Lopez just turned 56 and celebrated her birthday right in the middle of her Up All Night tour. And on top of slipping into a backless silver dress / partying with friends (while dancing to her new song "Birthday," naturally), J.Lo shared a bunch of photos to Instagram—including one without an ounce of makeup.