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Wearing black flares and a bustier that appears to be Alaïa, Gisele Bundchen, model, mother and amateur Under Armour boxer, challenged Jimmy Fallon to a plank off. Jimmy wore a suit. Gisele won. And now we all know the secret to Brazilian super model abs. Step one: Genetics. Step two: Planks all day, every day.
Now that you've got the abs down, here's the yoga move for getting those arms in Gisele shape, as told by not Gisele: