== == File:Chelsea Manson.jpg Chelsea is a rich, spoiled Prima Donna from Manhatten. She constantly complains about how much better New York City is. However she does take an interest in Phineas and Ferb's contraptions. She loves to tease Isabella about how so out-of-fashion she is, and brags about a new chic garment she get's. She get's her accent from her old nanny.