okay, I for sure know number one. It's totally Music of the Night, Phantom. 14 is Ironic by Alanis Morisette, 16 is Real Good Time by Pink. 12 is Best Years Of Our Lives by Baha Men (unless there's other songs that start that way). Umm... 5 is Sunset, I think. 20 is Tango de Roxanne, of course. 6 is that Reputation song though I forget who it's by...

That's all I can hazard to guess, although I have a suspicion that one of those is from Once More With Feeling. Hmmmm.