Some that come to mind.
Dream Theater - Number of the Beast Album (Iron Maiden)
Dream Theater - Dark Side of the Moon Album (Pink Floyd)
Iron Maiden - Kill Me Ce Soir (Golden Earring)
Iron Maiden - Communications Breakdown (Led Zeppelin)
Iron Maiden - Doctor Doctor (The Who)
Black Tide - Hit The Lights (Metallica)
Motley Crue - Smokin In the Boys Room (Brownsville Station)
Lita Ford - Only Women Bleed (Alice Cooper)
Icarus Witch - Mirror Mirror (Def Leppard)
Yngwie Malmsteen / Dio - Dream On (Aerosmith)
Guns N Roses - Mama Kin (Aerosmith)
Tim "Ripper" Owens - Hey Jude (The Beatles)
Elf - Behind Blue Eyes (The Who)
At Vance - Money Money Money (Abba)
Xentrix - Ghostbusters (Ray Parker Jr)
Withering - Eye of the Tiger (Survivor)
And last of all, one that has to be embedded because the video (with matching vocals) is hilarious.
http://www.youtube.com/watch?v=UrP8TifG5HY&feature=related