Bruno Mars' "That's What I Like" (Atlantic) will get another week of being #1 at T40, while The Chainsmokers & Coldplay's "Something Just Like This" (Disruptor/Columbia) wiggles up to #2. James Arthur ascends to #8 with "Say You Won't Let Go." DJ Khaled's "I'm The One" featuring the all-star cast of Justin Bieber, Quavo, Chance The Rapper, and Lil Wayne (We The Best/Epic) is this week's Greatest Gainer and climbs all the way up to the Top 20 after just one full week of airplay. Another big jump from Shawn Mendes' "There's Nothing Holdin' Me Back" (Island/Republic), moving Top 25. Luis Fonsi & Daddy Yankee's "Despacito" f/Justin Bieber (UMLE/RBMG/DefJam) moves up inside the Top 30. Capitol has two songs charting this week, Katy Perry's "Bon Appétit" f/Migos and Sam Hunt's "Body Like A Back Road" (MCA Nashville).