Channing Tatum: dancer, actor . . . R&B singer? This week, the star released his first music video for "(I Wanna) Channing All Over Your Tatum," a collaboration with Jimmy Kimmel and his White House Down costar Jamie Foxx. The song title basically speaks for itself, but it's a can't-miss video thanks to cameos from Olivia Munn, Miley Cyrus, Gabourey Sidibe, and an A-list actor who pops up for just a second.