Disruptor/Columbia's The Chainsmokers will remain in the #1 position on the chart for a second week with their Halsey collab, "Closer," but The Weeknd is already hot on their trail with "Starboy" f/Daft Punk (XO/Republic), easily capturing the Greatest Gainer honors which should put him Top 15 when all is said and done. Calvin Harris' "My Way" (Columbia) joins the Top 20 and it looks like Def Jam will put Alessia Cara's "Scars (To Your Beautiful)" into the Top 20 as well. Sia's "The Greatest" f/Kendrick Lamar ascends into the Top 25 while Ariana Grande's "Side to Side" f/ Nicki Minaj (Republic) joins the Top 30. Charting this week will be Capitol's new signing Niall Horan (of One Direction fame) with his inaugural solo single "This Town" and Kanye West's "Fade" (G.O.O.D./Def Jam).