Cassie Does Vocals for Jay-Z's 'Roc Boys'

After reading through the booklet of our Jay-Z American Gangster CD, we noticed that “Roc Boys (And The Winner Is)…” features vocals from Beyoncé and oddly enough, Cassie. Of all people, Cassie doing background vocals for Hov? We’re sure people will have something to say about this. It most likely has to do with the fact that Diddy produced the song. She’ll probably collect some checks from this one.