This weekend's episode of Nickelodeon's new show School of Rock, based on the 2003 Jack Black film of the same name, will have us saying "Thnks fr th Mmrs."

Fall Out Boy frontman Pete Wentz is guest-starring on the episode "Cover Me," which airs Saturday, March 19 at 8:30 pm ET/PT. He's playing Colton, Dewey Finn's (Tony Cavalero) rival and former bandmate who doesn't want to sell back Dewey's favorite guitar. But when he meets Zack (Lance Lim) and Lawrence (Aidan Miner), two of Dewey's bandmates/students, Colton ends up agreeing to bet the guitar based on who will Battle of the Bands.

OK, I just can't get over Wentz's hair here. And him making fun of Zack and Lawrence is definitely a side of him I've never seen before.

And while Wentz and Cavalero were opponents on the show...

...they were a couple of goofballs off set.