Which American rapper co-wrote a song featured on the album unfold?
Unfold (Marié Digby album):  The album features the singles "Umbrella" (a cover of the Rihanna hit), "Say It Again" and "Stupid for You", and was released on April 8, 2008 in the United States via Hollywood Records. Umbrella (song):  It features American rapper Jay-Z, who co-wrote the song with its producers Tricky Stewart and Kuk Harrell, with additional writing from The-Dream.
i don't know