The Obamas headed out west to check out Yellowstone, the Grand Canyon, and other western sites over the weekend. On Saturday, Michelle Obama wore a very pretty dress arriving in Phoenix, Arizona. It was one of three outfits she wore that day (she had a different outfit for each state). In fact, you’re five outfits behind if you neglected to MObama-outfit-watch over the weekend. See the full looks in the Michelle Obama Look Book.