Complete the indicated task in Career mode to unlock the corresponding character.

Adam Levine: Complete Gig on Maroon 5 "She Will Be Loved".
Adrian Young: Complete Gig on No Doubt "Don't Speak".
Frankenrocker: Complete Diamond Bonus Challenge on Fall Out Boy "Sugar, We're Goin' Down".
Gwen Stefani: Complete Gig on No Doubt "Just A Girl".
Shadow Character: Complete Gold Bonus Challenge on David Bowie "Let's Dance".
Skeleton Character Complete Platinum Bonus Challenge on Poison - Every Rose Has Its Thorn
Taylor Swift: Complete Gig on Taylor Swift "Love Story".
Tom Dumont: Complete Gig on No Doubt "Just A Girl".
Tony Kanal: Complete Gig on No Doubt "Don't Speak".