On 50 Cent official blog it was confirmed that 50 cent would be lending their voices to the upcoming Call of Duty: Modern Warfare 2. This what has appeared on the blog:
“50 Cent visited Infinity Ward yesterday. They are the creators of Call of Duty: Modern Warfare 2
This game is slated to be the biggest game release ever on 11-10-09.
50 was cast as The Multi-Player Voice.
Benji & Joel Madden of Good Charlotte were there too to check out the game and tour the company. 50, Benji & Joel teamed up to play MW2 on Xbox 360 against the guys at Infinity Ward.”