Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

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