#10: Baby, It's Cold Outside - Sammy Davis Jr. & Carmen McRae

There are a lot of versions of this one out there, but Sammy & Carmen's has to be my favorite.  Sammy is such a ham in this, and you can hear Carmen's laughter throughout the song.  The fact that they left the life in the recording is probably what makes this so great to my ears, especially when you compare to more modern recordings that appear dull and lifeless.
Here's a link to listen.