The Chubbchubbs! (2002)

More than anything, Meeper, the humble janitor of the Ale-E-Inn, a seedy extraterrestrial bar in the heart of the cold space, longs to sing karaoke on the nightclub's stage. However, anxiety and an unstoppable menace get in the way of fulfilling his aspiration, and as if that weren't enough, no one listens to Meeper when he tries to warn the Inn's regulars that the ferocious ChubbChubbs are coming. Now, there is no going back, and Meeper has to take matters into his own hands--even if this means he will have to confront one of the fiercest race of alien warriors in the whole universe.