Channing Tatum showed off his singing skills by performing with rapper/singer Biz Markie during his surprise show at Comic-Con in California on Friday (25Jul14).

The actor was taking part in a panel discussion at the convention in San Diego to promote his new movie Book Of Life when Markie took the stage for an unannounced appearance.

The star performed his track Just A Friend, and Tatum joined in.

Tatum posted a video of his impromptu karaoke session to his Twitter.com page, adding, "Biz Markie brought down the house at 20th Century Fox's #BookofLifeSDCC panel! Yooooooouuuuu got what I neeeeeeeed (sic)..."