Last video! We go back to our regular Vegas programming tomorrow, ok? Chill! But we are going out with a bang! Some mambo / West Side Story epicness! Jennifer Lopez left it all on the floor of her new Vegas residency! Brava!! | Perez Hilton shares video he took of Jennifer Lopez CRUSHING the dance break for "Waiting For Tonight" during her new Las Vegas residency at The Colosseum Theater at Caesars Palace.