Alvin, Simon and Theodore are back, along with their stressed-out manager, Dave. But this time they've got competition: The Chipettes.

When a powerful villain comes after peace in his valley, a slacker panda rises to the challenge to realize his destiny and become a kung fu warrior.

Talented chipmunks Alvin, Simon and Theodore become singing sensations when they meet struggling songwriter Dave Seville, who becomes their manager.

When their relationship turns sour, a couple undergoes a medical procedure to have each other erased from their memories for ever.

With aliens once again threatening Earth, Agent J will need to refresh his partner's memory and get them both ready for a high-octane mission.