sentences:  These transformations will empower the player with extra abilities in a song such as constant score multipliers or Star Power bonuses.These abilities are each unique to the individual rockers and by using them effectively, it is possible now to earn up to forty stars for a single song.When playing through Career mode or in other parts of the "Guitar Hero" games, the player has the option to select one of several pre-created avatar characters, who will be shown performing on stage as the player attempts a song, but otherwise has no effect on the gameplay.