Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
A perfect performance (100 points)	No one is as good as you. Get 5 Stars in a single song.
atron of the Arts (100 points)	C'mon! Spend those Stars and buy up all the items for all the Chipmunks!
Big Spender (100 points)	Make sure your Chipmunk look stylish and buy up all the items for it!
Everyone grab a partner! (100 points)	Dancing by yourself is good, dancing with a partner is better! Complete a song in Coop mode!
Go Nuts! (100 points)	Solo mode is the time to go crazy! Go nuts and get the best score!
It went a little like this... (100 points)	Come along for the ride and complete a song in Story mode.
Power Performer (100 points)	Show off your smooth moves and get 4 Munkpowers in the same song!
Simply the Best (200 points)	You are the absolute best. Only one way to prove it: get 5 Stars in all songs!
The Whole Story (100 points)	Get to know the full story and complete Story mode.