The holiday spirit continues to spread across the land! Last night in Washington D.C., the First Family flipped the switch at the National Christmas Tree lighting, setting the 28-foot-tall blue spruce aglow. Host Neil Patrick Harris and performers Jason Mraz, Colbie Caillat and James Taylor added some comical and musical cheer to the festive occasion. Meanwhile back in the ever-fashionable New York City, Miu Miu unveiled their holiday windows, which combine the timeless elegance of 19th century Paris with pieces from their modern collections. Click through the gallery to see more holiday tree lightings, pretty store windows, and more!