Unlock the following songs by performing the corresponding tasks on Medium difficulty or higher:
SONG - HOW TO UNLOCK Shout At The Devil - Beat the first set and peform the encore. Tonight, I'm Gonna Rock You Tonight - Beat the second set and perform the encore. War Pigs - Beat the third set and perform the encore. Sweet Child O' Mine - Beat the fourth set and perform the encore. Last Child - Beat the fifth set and perform the encore. Stop - Beat the sixth set and perform the encore. YYZ - Beat the seventh set and perform the encore. Free Bird - Beat the eighth set and perform the encore.