First lady Michelle Obama's affinity for hitting the gym is no secret. She showed off some of her hard work when she wore a pair of short shorts while visiting Hopi Point at the Grand Canyon National Park in Arizona, Aug. 16, 2009. She paired the revealing navy blue shorts with a white shirt worn underneath a checkered, multi-colored blouse. Never one to skimp on accessories, Obama sported a lavender watch designed by Toywatch. (Dana Felthauser/AP Photo)