Susie, an alternative identity of Brittany Miller, is a character in The Chipmunks Go to the Movies in the episode Irrational Buffoon's European Vacation.
Personality
She is Alvin Sevillewald's girlfriend who had a fiery temper especially when she found out that Alvin had been hanging around an attractive french girl during the trip when his father had arranged Susie to join them as a surprise.