Ellie Knaus
Through a series of misunderstandings, Alvin, Simon and Theodore come to believe that Dave is going to propose to his new girlfriend in New York City - and dump them. They have three days to get to him and stop the proposal.
Rob "Fish" Fishman is the drummer in '80s hair metal band Vesuvius. He's unceremoniously booted as the group signs a big record deal, is out of the music world for 20 years - and then receives a second chance with his nephew's band.
