Today is a big day for two reasons: the film Pain and Gain starring Mark Wahlberg and Dwayne "The Rock" Johnson hits theaters, and Channing Tatum turns 33! And what's one thing these three guys all have in common? They don't look too bad with a shirt off!

For this week's Hot Guy Friday, we're bringing you the hottest pics of three of Hollywood's biggest muscle men -- you're welcome!

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Who is your favorite Hollywood beefcake?