Unlock the following characters by completing the corresponding songs:

CHARACTER - HOW TO UNLOCK
Carlos Santana - Complete "No One To Depend On (Live)"
Johnny Cash - Complete "Ring of Fire"
Kurt Cobain - Complete "Smells Like Teen Spirit"
Matt Bellamy - Complete "Plug in Baby"
Shirley Manson - Complete "I'm Only Happy When It Rains"
Skeleton - Beat the Platinum or Diamond drum challenge for "Brianstorm".
The Golden God - Beat the Platinum or Diamond challenge for The God Of Rock's Final Challenge.
Shadow - Get a 600 note streak on "Lust For Life (Live)" in Career mode.
FrankenRocker - Complete the Diamond challenge on A-Punk on bass in Career mode.