Which girl is on fire ... in her Michael Kors dress?

20-year-old supermodel Karlie Kloss wore the sexy Spring 2013 gown to the Grammy Awards on Sunday. The strategically placed cut-outs just managed to barely fall within the Grammy dress code. Given the gown's graphic look, Karlie kept things simple, wearing simple gold jewelry. We really dig her smoky eye and soft curls, too.

Alicia Keys wore a longer black version to the NRJ Awards in Paris late last month. She paired it was an equally graphic black and white necklace and a wavy updo.

Both ladies look great, but Karlie gets our vote. The dress looks amazing on her long body and the icy-blue is so refreshing to see on the carpet. Alicia's dress is a bit more ho-hum, and the necklace competes rather than complements.

But it's your opinion that matters. Who's the hottest of the girls? Click on the "Launch Gallery" button above to cast your vote on this and more fashion face-offs!