Currently on my mp3 player I have:

Nightwish
Tarja
Barenaked Ladies
Arrogant Worms
My Chemical Romance
Luna Coil
Type O Negative
Beethoven
Chopin (ya think I have a wide variety here?)
Serj Tankian
Within Temptation
Evanescence
Epica
The song "The Monster Mash"
Annie Lennox
David Bowie
The Moulin Rogue Soundtrack
Twilight Soundtrack (the movie recently released) .
Mika (because OMG ... he sounds JUST like Freddie Mercury)

And that's all I can think of now. My music can interchange with Beatles, Elvis, Queen, Starship, Sha Na Na's, Four Seasons, etc..