The Fall Out Boy star was in his late 20s when he played himself on The WB teen drama series over three episodes during the 2005-2006 season. "Poor Pete. Pete really thought he was just coming on the show to play like, a cool dude," Burton says of his three-episode arc. "And the next thing you know, it looks like he's having an affair with a high school girl. And that is forever now on TV. You don't get to takesie backsie that one."