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Katie Holmes must have been going nonstop for the holidays. She looks pooped!

Tom Cruise's wifey, sporting a fresh face, was anxious to get to her Beverly Hills gym to work off those excess holiday pounds. We'll admit, even without makeup, Katie looks fab! Suri's mom just celebrated her 33rd birthday last week in New York.

Now that her hubby's movie Mission: Impossible - Ghost Protocol is out in theaters and raking in the dough ... let's hope she'll slow down.

Love the Uggs by the way, Katie!