Any vocals that you like?

Jerroot read my mind!

Also:
Rickie Lee Jones (Especially Rickie Lee Jones album and Pop Pop album)
Louis Armstrong - St. James Infirmary
Melody Gardot Live in Soho
Fleetwood Mac Rumours (top 10 all-time selling LP)
Crosby, Stills, Nash & Young (self-titled & Deja Vu)
Beach Boys - Pet Sounds (Mono as intended!)
Peter Gabriel - New Blood especially Red Rain

Cheers,
Spencer

Judy Collins--Who Knows Where the Time Goes (album)
Patsy Cline--Sweet Dreams
Joan Baez--I Dream of Jeannie/Danny Boy
Tom Waits--Blood Money (album)
Roy Orbison--Crying
Stevie Wonder--You and I
Aaron Neville--Save the Last Dance For Me

Patricia Barber "Too Rich For My Blood" nuf' said!

Beyonce' performing Etta James in "Cadillac Records" was pretty spectacular!

Off the top of my head and not yet mentioned:

Aretha Franklin
Joni Mitchell
Tina Turner
Eva Cassidy 
Annie Lennox
Nina Simone
Florence Welch
Janis Joplin
__________

Bob Dylan
Elvis
Al Green
Jeff Buckley
Jackie Wilson
Elvis Costello (Best terrible singer award)
Ray Charles
Curtis Mayfield
Smokey Robinson
Elton John
Robert Plant
Sam Cooke 
Otis Redding
James Brown
Marvin Gaye
(Younger) Van Morrison
Levon Helm
Simon & Garfunkel