They're for RB3. I'm trying to verify some data. I looked around and couldn't find any information on these to confirm if you can earn them or not. I only have Wii to test on, so it's not the best to test with.
That's One Tricky Button
Hit 100% of the notes in "The Hardest Button to Button" by The White Stripes on Expert Bass.
Earn 5 Stars on "Holiday in Cambodia" by Dead Kennedys on Bass.
Fill It Up on Pro Drums
Complete 170 drum fills on Pro Drums by hitting the crash note at the end of each fill.
Button the Hardest Button
Max out your score multiplier on Pro Guitar on "The Hardest Button to Button" by The White Stripes.
Don't Fear the Meter
Beat "(Don't Fear) The Reaper" on Hard or Expert Drums.