CW Tween Stars Get Sleek & Sophisticated For Upfront Party

The young stars of 90210, Gossip Girl and the new faces from the revamped Melrose Place are in full-on promotional blitz mode for the CW Upfronts.

After their work was done on the red carpet, the cast flitted over to the Gramercy Park Hotel to celebrate. Pete Wentz showed up to support his wife Ashlee Simpson in her new role on Melrose Place. Little world traveler Bronx Mogwli Wentz opted to stay in for the evening.

Most of the kids kept it simple except for rock star-in-training Taylor Momsen, whose shocking blond hair, porcelain skin, bright red lips and sparkly black dress was pretty hard to miss.

Gallery Info: Jessica Szohr, Ed Westwick, Ashlee Simpson, Pete Wentz, Taylor Momsen, Blake Lively, Penn Badgley, Chace Crawford, AnnaLynne McCord, Jessica Lowndes, Julianne Moretiz, Katie Cassidy, Paul Wesley, Shenae Grimes, Nico Tortorella, Laura Leighton, Ben Hollingsworth, Ian Somerhalder, Jessica Stroup and Colin Eglesfield at the CW Stars Upfront party at the Gramercy Park Hotel.