Album: Metamorphosis

Lizzie McGuire can do no wrong. "So Yesterday" was born out of an attempt to have Hilary Duff make a smooth transition from Disney star to mature young adult. It deals with the theme of breaking up and moving on to a point where your ex becomes-you guessed it-so yesterday. Accompanied by mildly angry guitar riffs, Duff is almost too sweet to be on a "screw you" track, but we sort of like it that way. Her cuteness is only further confirmation that she is totally cool with the breakup. The only thing worse than a psychotic ex is one who doesn't care about you enough to even hate you a little bit. Kind of bad bitch, no? -Alysa Lechner