This game is fun but not as good as the American Idol games. Yes, you can sing duets if you have 2 mics. But, on solo mode, you can only, I repeat ONLY, sing as the male part. You CANNOT sing the female part solo. Now, that's lame in my opinion. So, if you like High School Musical and you are 1)male, 2)female but don't mind singing the male parts or 3)plan to always sing duets, then this game will entertain you. If you thought you were going to rock out as a solo female vocalist, then pass on this one.
Other aspects of the game (graphics, music quality, ease of use) got a rating of "fine" from my wife.