After gaining a brief taste of major-label success during the '80s and '90s -- particularly with Marvelous 3, whose single "Freak of the Weak" became a modern rock hit in 1999 -- singer/guitarist Butch Walker traded his bandmates for a solo career. Meanwhile, he also established himself as an in-demand producer by working with marketable artists like Avril Lavigne, Katy Perry, and P!nk.