Your Favorite Music Cover artists ?

Guys, can you all name few Music Cover Artists which I can listen to? I would appreciate the list of the independent artist. 
You mean like Jennifer Warnes? Holly Cole?
Linda Ronstadt has What's New, Lush Life, etc
Sinatra, Torme, its a long list.
"The Life Aquatic" Studio Sessions, Featuring Seu Jorge if you like David Bowie.

The soundtrack to the movie "The Life Aquatic" is also good (not all covers though).