Channing Tatum Sings 'Just a Friend' with Biz Markie (VIDEO)

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Channing Tatum was promoting his upcoming movie Book of Life with Christina Applegate and Ron Perlman at the 2014 Comic-Con when they all got a surprise.

Biz Markie came on stage because he let them use his music, and he performed for them. He started singing his catchy hit "Just A Friend" when Channing Tatum joined in on the fun.

Check out this video for Channing's small part in the song.

Biz Markie got the whole crowd and cast singing and dancing along with him at this very special panel. What do you think of Channing's singing voice?

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