Rock Band single-player question.

Just wondering; is it possible to play the drums in single-player mode in Rock Band 3? Or only the guitar is single-player, and the rest you gotta play in a band? Thanks.

Well they have career mode its a lot of fun..Thats single player you can choose any instrument..There is also solo songs you can do..Ive had a lot of fun with the career mode myself..Drums being my fav even though the keyboard is growing on me..