Cee Lo

After taking the stage dressed as a band leader and dueting with Madonna on "Express Yourself" and the grand finale, "Like a Prayer," Cee Lo fans freaked, causing his online presence to surge to over 2,000 percent above normaland nearly double any other Super Bowl act...

Source: http://www.businessinsider.com/stats-cee-lo-was-more-popular-than-madonna-in-the-super-bowl-halftime-show-2012-2