As the chipmunks are preparing their classroom for a party, Miss Mooney, their teacher, informs The Chipettes that at least one parent must attend. Brittany decides to dress up and play the part. Meanwhile Dave asks Miss Miller, the boy's neighbor, to take The Chipmunks to the party while he waits for an important call. After Miss Mooney discovers the girls live alone, Dave is guilted into taking them in. The Chipmunks move into the attic while the girls take their room. Tensions between the groups rise, but when a social worker arrives they pretend everything is perfect to avoid being split up.
Seeking a solution, Alvin sets out to convince Miss Miller to take them in. The Chipettes aren't thrilled with having a foster mother, let alone a crazy one. Once they move in, Miss Miller begins to the treat them like babies. The next day at school, the girls and Miss Miller simultaneously believe the arrangement won't work out. When Brittany is reminded about the school's upcoming talent show, Miss Miller teaches the girls a routine that she claims made her a star. The social worker arrives once more, but the girls convince her that Miss Miller is a worthy guardian. At the talent show, The Chipmunks win second and The Chipettes win first.
- "New Attitude" originally performed by Patti LaBelle.
- "I Wanna Be Loved By You" originally performed by Helen Kane.
- This is the first appearance of Miss Miller.
- The Chipettes' Treehouse is now just a hangout place for The Chipettes, as they are now living with Miss Miller.
- Near the end of the episode Jeanette's glasses land on Eleanor.
- This is the second episode where Jeanette and Simon argue (the first being The Chipettes).