Rihanna

Rihanna is a featured fighter in the Def Jam series and a playable character in Def Jam Control.

Def Jam Control
Rihanna appears early in the game's campaign and can be signed to Playa's crew and later possibly one of Playa's potential girlfriends. Later in the game right after the defeat of King Kunta it's revealed that she actually belongs to Jay Z's Rap Illuminati, and acted as a sleeper agent who's been gradually been killing fighters in the crew. During the epilouge she fought multiple times.