TGJ still trying to downplay Katy's Superbowl slayage because it outperformed their favs. Poor that! Both artists won the Superbowl. You forget Katy Perry is the top selling digital artist, of course her increase won't be as large as a an artist who had their peak in the "physical age" of music. I'm so excited to hear that Katy will be performing By the Grace of God, it is my favorite song off Prism. When she performed it at the iHeart Radio concert the week before Prism was released, it was her best performance.