Thousands flocked to the Newseum on Monday night for one of Washington's hottest Inauguration Eve parties. The soiree was hosted by pundit Arianna Huffington and her left-leaning news and opinion Web site HuffingtonPost.com and was sponsored by cable giant Comcast, social networking site MySpace.com and others. Rock legend Sting, pop singer Sheryl Crow and hip-hop star Will.i.am performed for the boisterous crowd. Intel also offered demos of the ePALS online community. Watch a video clip of the scene and Will.i.am's "It's A New Day" number here. More photos after the jump...