As the CD isn't even out yet, I doubt there are any YouTube files around. I made a quick easy to understand pic over a "rough" google translated page :
I hope this helps! ^^b
About the songs :
-I absolutely love Unohana's singing voice! Very gentle soothing
-Son Fon and Yoruichi sound really great together!
-Ukitake has a pleasant singing voice too
-I'm a bit disappointed in the portion of Shoujo S I heard though...