The biggest story on the T40 chart this week is Capitol's Katy Perry, who will not only chart with "Chained To The Rhythm" but also climb up inside the Top 15, after literally "clearing the panel" and posting 3500+ spins on impact. Meanwhile, WestburyRd/Roc Nation/Def Jam's Rihanna joins the Top 5 with "Love On The Brain," while Republic's Marion Hill jumps up inside the Top 20 with "Down" (Photo Finish). Also joining the chart this week will be Big Sean's "Bounce Back" (G.O.O.D./Def Jam).