"DeTour" comes from "Psych" creator Steve Franks
Musician played on hits "Island in the Sun" and "Hash Pipe" before quitting band due to nervous breakdown
Weezer recorded The Cars' "You Might Think" for Pixar's film, and Williams and Paisley recorded a duet
Following in the footsteps of Smash Mouth and Eddie Murphy, Weezer has covered The Monkees' "I'm a Believer"
Band cancels remainder of tour