Fresh off the second anniversary of Michael Jackson's death, Katy Perry is on the heels of one of his biggest records. The pop star is closing in on five #1 singles from the same album, a feat that hasn't been achieved since Bad. Her current hit "Last Friday Night (T.G.I.F.)" sits at #4 on the Billboard Hot 100, moving up 27 slots since last week. We bet it reaches the top in the coming weeks.