Soaring off momentum from the freshly released video, one of the Greatest Gainers inside the Top 10 this week is Taylor Swift and ZAYN's "I Don't Wanna Live Forever" (UStudios/BMR/RCA-Republic), which notches up to #4. Rihanna's "Love On The Brain" (WestburyRd/RocNation/Def Jam) also moves up this week, climbing to #7. Shawn Mendes' "Mercy" (Island) joins the Top 10, along with two others that have launched upwards, The Chainsmokers' "Paris" (Disruptor/Columbia) which moves #15 to #11 and Jon Bellion's "All Time Low" (Capitol), leaping from #14 to #12. Republic has two big movers inside the Top 30 with Julia Michaels' "Issues" at #27 and Marian Hill's "Down," charting at #30, while readying label mate Ariana Grande for a debut on the chart with "Everyday" f/Future.