Def Jam's Alessia Cara will remain in the #1 spot on the T40 chart this week, while Taylor Swift and ZAYN's "I Don't Wanna Live Forever" (UStudios/BMR/RCA-Republic) gains momentum and climbs into the Top 5. Shawn Mendes' "Mercy" (Island/Republic) moves up to #11 and looks poised to join the Top 10 soon. Capitol has two songs moving up inside the Top 20, as Niall Horan's "This Town" jumps to #13 and Jon Bellion's "All Time Low" segues to #14. The Chainsmokers are nearly halfway up the chart already with "Paris" (Disruptor/Columbia) and joining the Top 20 this week is Bebe Rexha's "I Got You" (Warner Bros.). RECORDS' Noah Cyrus "Make Me (Cry)" f/Labrinth moves Top 25, and charting this week is Julia Michaels with "Issues" (Republic), Starley's "Call On Me" (Epic) and don't be surprised if Columbia's James Arthur sneaks in as well with "Say You Won't Let Go."