Amy Sanders

All info was provided

http://lizziemcguire.wikia.com/wiki/Amy_Sanders

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.

Kate and Amy seem to have a rocky relationship, because in the episode "Party Over Here", she didn't even know that it was Kate's birthday. Kate is shown to be a lot nicer and mature than Amy. Amy also appeared in "Clue-Less" and "Xtreme Xmas".

Season 2

 * Party Over Here
 * Xtreme Xmas
 * Clue-Less

Trivia

 * Cousin Amy was portrayed by Haylie Duff, Hilary Duff's older sister.