Guest List: Justin Timberlake

Justin Timberlake ranked pretty high on the list of unlikely hip-hop stars during his *NSYNC days. So it's a testament to the cred-boosting power of producer Timbaland that JT has gone on to work with many of the hottest rappers out there. Justin is now a rap-game veteran, lending his pipes to legends like JAY Z and 50 Cent, and earning love from MCs like Drake and J. Cole.