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Looks like someone stole her baby daddy's flannel for an early morning workout!

Kim Kardashian was snapped heading into the gym on Thursday, and after wearing a skintight skirt the previous day, the reality star decided to cover everything up with a plaid Pyrex shirt.

At first we thought this might have been Rob's (after all, given the amount of weight he's gained recently, we're not sure what he's fitting into these days), but Kanye West has previously been spotted wearing the brand's hoodies and tees.

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