Alternatively, what's your favorite covers? To talk about your most hated, go here:
http://atrl.net/forums/showthread.php?t=83178
Fergie - Barracuda
I Nine - Black Hole
Miley Cyrus - These Four Walls
Katy Perry - Use Your Love
Aly & AJ - Do You Believe In Magic
Avril Lavigne - Knockin' on Heaven's Door
Kelly Clarkson - Respect
Skye Sweetnam - Superstar
Raven-Symone - Double Dutch Bus
Rihanna - Redemption Song
Sheryl Crow/Kid Rock/Keith Urban - Lean on Me
The Veronicas - Goodbye to You
David Archuleta - Angels
Carrie Underwood - Home Sweet Home
The Fray - Heartless
Kris Allen - Heartless
That's the ones I can pick off the top of my head.