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I just opened my copy of American Gangster. I was pleasantly surprised to see that beyond just Diddy, Sean C, LV and Mario Winans, Bad Boy artists Cheri Dennis, Cassie and Shannon Jones contributed, as well as Bad Boy writers Adonis Shropshire and Carmen Cameron. Here's the noteworthy stuff:

"Pray"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Mario Winans provides strings and drums. Bad Boy writers Adonis Shropshire and Carmen Cameron provide vocals, as do Bad Boy artists Cheri Dennis and Shannon Jones. Interestingly, Cheri Dennis appears courtesy of Cozier Entertainment, Inc./Bad Boy Records instead of just Bad Boy Records.

"American Dreamin'"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Co-Produced by Mario Winans for Yellow City Entertainment/The Senate. Winans also provides live drums and strings.

"No Hook"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Strings and drums by Mario Winans.

"Roc Boys (And The Winner Is...)"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Drums by Mario Winans. Additional vocals by Cassie.

"Sweet"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Drums by Mario Winans. Additional vocals by Cassie and Carmen Cameron.

"Party Life"
Produced by Diddy and LV & Sean C for Grind Music/The Hitmen/Bad Boy Entertainment. Drums by Mario Winans. Vocals by Shannon Jones.

Diddy, LV and Sean C receive writing credits on all 6 songs.

There is a very cool thing at the very end of the credits. Though Diddy didn't get an executive producer credit, he did get a mention in the very last words printed in the booklet. "Associate Producer: Sean "Diddy" Combs and The Hitmen".