While listening, I did realize that Tom Petty only has two solo lines in the whole song ("I know you really wanna tell me goodbye / I know you really wanna be your own girl"). Had I not seen them performing the song together, live, I could have believed that he recorded his voice in a studio and e-mailed (AOLed) it to her for the rest of the song.
But, hey, when those two lines come along, what guy *doesn't* sing Tom Petty's part with a sneer in his voice and a curl in his lip? "Even the Losers (Get Lucky Sometime)", "Don't Do Me Like That", "Breakdown" - Tom Petty and the Heartbreakers was music for the guys who thought they might just have some cool in them, even if most external evidence pointed to the opposite.
I think today is going to be a Tom Petty day!