seems to be the thing to do nowadays - Duets!
http://www.amazon.com/Elvis-Presley-.../dp/B001EPJTMK
video at the link has the duet artists and one freaky looking Priscilla Presley..
Anne Murray sings "Silver Bells" with Elvis on his CD and has her own new XMAS cd witha couple of duets on it..Michael Buble and Diana Krall. She also sings Silver Bells on her cd..
you can listne @
http://www.annemurray.com/