Many people (including at least the majority of the members on this board I'm sure) perhaps best know her as Elsa in Frozen, but I actually first discovered her when I heard a 2005 duet she did with Ray Charles, needless to say Charles' involvement was posthumous since it was a year after he died of course, but she has a lovely voice (she's also pretty hot), and I rather enjoyed this album more than I expected. So far I've only been able to listen to it twice, but her voice is such a delight, and she is a very pretty woman.
http://www.last.fm/music/Idina+Menzel/+images/97675935