Gossip Girl stars Chace Crawford and Penn Badgley hammed it up for the cameras during TRL at MTV studios in Times Square...

Penn Badgley revealed that he wears Calvin Klein underwear!

The pair dished the dirt on each other, revealing what they "really thought about each other." Ed Westwick, who was also on hand, apparently is a big musician and is part of a band back in the UK.

Between the three of them, Penn Badgley is the biggest player, Ed watches the most chick flicks and Chace? Well, he got burned. He apparently spends the most time in front of the mirror, likes the worst music, tells the worst jokes and takes advantage of the most celebrity perks! Oh, snap!

Follow the jump for more cute photos of Penn Badgley, Chace Crawford and Ed Westwick from their trip to TRL ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.