Benji Madden

Forget delivering hit songs — Benji Madden can deliver knockout punches.

The Good Charlotte rocker defeated former MTV host Riki Rachtman Saturday in a celebrity slugfest in Las Vegas, People reports. Madden, 31, knocked down Rachtman three times in one minute and 40 seconds, causing the referee to stop the match.

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Rachtman, who hosted MTV's Headbangers Ball, said afterward: "I got wasted by the guy in Good Charlotte."

Watch videos of Riki Rachtman

Madden, who climbed the ropes of the ring after his victory, thanked Rachtman for the "best backhanded congratulations I've ever gotten."

His twin brother, Joel, who escorted him to the ring, was much more complimentary: "Congrats @benjaminmadden for the win last night," Joel Madden tweeted Sunday.