Brittany Perfume Seville is the lead singer and leader of the The Chipettes and is the female counterpart of Alvin. She is the older sister of Theodore and Eleanor. Her last name is Miller, but it's wrong because it's Seville in the 80's cartoon, but she does not have a stated last name in the CGI films. It is presumed to be Seville because of The Chipettes being adopted by Dave. However, this would be controversial, as it would make her Alvin's sister in addition to his love interest.