Yes, listen to "Forget About The Boy" and turn off the iPod just before the "Jimmy, oh Jimmy" portion starts up!
"A Change In Me" from Beauty and the Beast is great, too, but you'll have to download it off of Susan Egan's album "So Far" (that is, if you want it legally). This is one of the more positive 'move on' songs.
"Another Suitcase, Another Hall" from Evita. This is more of a negative song.
"Farewell, Good Angel" from Jane Eyre. (Negative.)
Oh... and of course the angry reprise of "Where's the Girl" from Scarlet Pimpernel-- "Let her go! Let her live, let her die on her own! We are all of us bruised and alone, now we both will have nothing to hold!"
In my pants, she has burst like the music of angels, the light of the sun! --Marius Pantsmercy