To the tunes of Tina Turner and Katy Perry, Democrats gathered four floors below ground, deep in the Washington D.C. Marriott Marquis to hear from a litany of Democrats and one "special guest" whose name did not appear on any formal program. 

Check out this list of all the acts to play the Super Bowl since 1967.

The owners of the downtown Minneapolis nightclub where Prince's "Purple Rain" was filmed were holding an all-night dance party in his honor.