Sum 41 needs to be in Rock Band. Period.
Some good suggestions:
"No Reason" (Album: Chuck)
"Thanks for Nothing" (Album: Does This Look Infected?)
"Underclass Hero" (Album: Underclass Hero; Also, this song a Single)
"In Too Deep" (Album: All Killer No Filler)
Heck, if you want bring Fat Lip back from the original Guitar Hero, just give us Sum 41!!!