While Dave is working on an important new song for the music festival, the Chipmunks are upstairs making a mess of their bedroom. Dave orders them to clean their room. But in the process, they accidentally ruin Dave's new song. Can they fix it in time for the big performance?

Alvin must pass a manners course before he gets his dream meeting with the beautiful Princess of England! Problem is, he has to convince Brittany he's worthy.