The single that many are hailing as the "Song of the Summer" has made its way to the top, as Luis Fonsi & Daddy Yankee's massive smash "Despacito" f/Justin Bieber (UMLE/RBMG/Def Jam/Republic) takes its turn at #1 on the T40 chart. Shawn Mendes' "There's Nothing Holding Me Back" (Island/Republic) enters the Top 10 this week and is on pace to make the Top 5 soon. The Greatest Gainer this week will be DJ Khaled's "Wild Thoughts" f/Rihanna & Bryson Tiller (We The Best/Epic), as it launches inside the Top 20. French Montana's "Unforgettable" f/Swae Lee (Eardruma/Bad Boy/Interscope-Epic) enters the Top 30. And joining the chart this week will be Noah Cyrus' "Stay Together" (RECORDS) and Macklemore's "Glorious" f/Skylar Grey (Macklemore/Warner Bros.).