Gaga performed a bunch of her hits -- Poker Face, The Edge of Glory, Applause, Paparazzi, Beautiful Dirty Rich, Dance In the Dark, Aura, Shallow and Scheibe.

She has a new alter ego -- a glittery metallic alien. Gaga soared over the stage in a silver jumpsuit, rode a robot with massive tentacles and sat in a giant egg that was hanging from the ceiling.

Gaga sampled a bunch of space outfits, including a black leotard with a lime green ruffle coat, a black bodysuit with silver foil and large shoulder pads, and a silver jumpsuit with matching boots.

More than 5,000 folks jammed into the venue for the show, including Katy Perry, Orlando Bloom and Adam Lambert.