Fashion Rocks 2014: Nicki Minaj, Jennifer Lopez, Rita Ora, Tinashe, & 2 Chainz

The music and fashion worlds collided at Fashion Rocks 2014 at Brooklyn’s Barclays Center on Tuesday. Music’s biggest stars showed out in their finest—and not so finest—during the live concert event, which was held during New York Fashion Week.

Nicki Minaj toned down her look, but still looked sexy as ever in a skin-baring black dress by Saint Laurent and Giuseppe Zanotti heels.

Before she shook up the stage with her banger “Booty,” Jennifer Lopez was stuntin’ on the competition in a slit black dress that showed lots of leg.

Rita Ora switched up her style, Mila J draped an oversized blazer over her shoulders, and Tinashe put on in an army green skirt and jacket while hosting the backstage pre-show.

Justin Bieber proved less is more by stripping down to his Calvin Klein underwear while introducing Rita Ora.

See more star sightings including 2 Chainz, Michelle Williams, and Estelle below.