The protagonist, Meeper, works at the Ale-E-Inn mopping floors, but dreams of being a singer. What part of the story is this?

Meeper is left alone to face the ferocious looking aliens he believes to be the Chubbchubbs. Just when it seems that it is all over for Meeper, the real Chubbchubbs, the fluffy chick-like aliens Meeper was trying to protect, reveal themselves.

Meeper is clumsy and causes injury to the actual singer at the Ale-E-Inn. He gets fired and then no one will listen to his warning that the Chubbchubbs are approaching