She's always wanted to be like Shannen! After Shannen left she always tried to be the best witch but couldn't because the next best one is Piper.
Anyways I was completely convinced when the came up with an episode with 3 phoebes in it (The three faces of Phoebe) sort of imitating the one in the first season with three Prues (Which Prue is it anyway?)...
Prue was and will always be the best!!