Chace Crawford says "Uh-Oh"

Hottie Chace Crawford from Gossip Girl makes an appearance during Z100′s Jingle Ball 2007 on Friday at Madison Square Garden in New York City.

Earlier this week, Chace partied at Marquee nightclub’s 4th Anniversary Party in NYC Thursday night with none other than American Idol alum Carrie Underwood.

According to People, she threw “her arms around his neck as they danced suggestively.” According to OK!, Chace snuck in a “bunch of kisses and cozied up next to [Carrie] all night.”

10+ pictures of Chace Crawford @ Z100 Jingle Ball…