Another week, another Hot 20 Dance Chart. Who’s on top this week? “C’mon,” from Tiesto vs. Diplo featuring Busta Rhymes, unseating last week’s champ “Higher,” from Taio Cruz featuring Kylie Minogue, which free-fell all the way to number five. New contenders this week: Eric Prydz, “Niton (The Reason)” at number 18, and Steve Aoki & Laidback Luke featuring Lil Jon, “Turbulence” at number 16. And keep your eye on “Who’s That Chick?” from David Guetta featuring Rihanna, which jumped all the way from ninth place to number four.