This game introduced Guitar Battle, in which two players play the same song in an attempt to make the other person fail the song before the end. To do so, star power is replaced with battle power-ups, such as raising the difficulty level of the song for the other person.
When one plays "Monsters" by Matchbook Romance in quickplay, during the final verse, the singer is not moving his mouth, but lyrics from Matchbook Romance's lead singer are heard. This is only evident in quickplay because in any other modes it is playable in (e.g. co-op career), the singer is not on stage.
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