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Amy Sanders is Kate's cousin. She is in a band and is not very responsible. She is practically like an older version of Kate only far more self centered and immature.
Kate and Amy seem to have a rocky relationship, because in the episode "Party Over Here" she invited only her own friends who proceeded to deliberatly break stuff, ignored Kats request for a strawberry birthday cake because she liked chocolate, and she didn't even know that it was Kate's birthday to which all she does is wish Kate a happy birthday before going off back to the party. Kate is shown to be a lot nicer and mature than Amy despite Amy being older. Amy also appeared in "Clue-Less" and "Xtreme Xmas".
- Party Over Here
- Xtreme Xmas
- Cousin Amy was portrayed by Haylie Duff, Hilary Duff's older sister.