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Chuck Liddell's XXX Workout -- The Naked Truth

2/26/2010 5:17 AM PST BY TMZ STAFF

Chuck Liddell and his extremely hot girlfriend will not be going after the person who taped them working out in a gym -- in nothing but shoes -- because the naked twosome was in on the act.



TMZ has learned the UFC badass and Heidi Northcott agreed to do the revealing workout for a viral campaign for Reebok -- a company that Chuck already has a sponsorship deal with.

Still, hope somebody sterilized the equipment after the shoot.

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