Who? Season One's Sideshow Bob–tressed second-place finisher.
Peak: Debut album on RCA was released around the same time as his corny feature film with Clarkson, From Justin to Kelly.
Low: Was unceremoniously dropped from RCA shortly after release of debut album.
Currently: Since wrapping up a Broadway stint in the Green Day musical American Idiot and appearing in touring productions of Rent and Chicago, he can be found providing Idol punditry for the TV Guide Channel.