Jennifer Lopez left it all on the floor during her whirlwind 2025 American Music Awards hosting gig on Monday night (May 26). After dancing to a breathless six-minute, 23-song medley of the year's biggest hits in a sparkling Tron-like futuristic leotard on the stage at the Fontainebleau Las Vegas - and kissing a couple of dancers along the way - Lopez chilled out when the curtain came down two hours later by announcing her second Las Vegas residency.