The stars are totally rocking in today's OK! Quick Pics!

In New York, Nick Cannon searched for the hottest new singer for America's Got Talent while Taylor Momsen took center stage at a photo shoot.

Photos: See What the Stars Wear to Work Out

Across the country in California, Kylie Jenner got decked out in '90s-style grunge to go to a Rihanna concert, and her big sister Kim Kardashian rocked her baby bump with a long flowy top.

Photos: Jet-Set Celebs Are All Over the Globe!

Check out these and the rest of today's OK! Quick Pics and tell us which ones you liked best in the comments section or on Twitter @OKMagazine