Photo PollMatthew vs. The World: Vote for the Hottest!

It's the war of the workouts – and McConaughey has some competition (Mario! Becks!) muscling in on his shirtless reign. Who's got more flex appeal? Vote!

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MATTHEW VS. MARIO

While filming Fool's Gold Down Under, onetime Sexiest Man Alive Matthew McConaughey has been giving Queensland beachgoers a daily dose of his shirtless sun worship. Meanwhile in L.A., Dancing with the Stars runner-up Mario Lopez is giving him a run – for the hottest biceps.

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