Interscope’s Romano and Lopes bring another one home as Rema & Selena Gomez’s “Calm Down” (Mavin/Virgin) moves to #1 on the chart this week. Republic’s Team Spangler sees Post Malone’s “Chemical” (Mercury) quickly climb inside the Top 10. They also have the Greatest Gainer of the week with Taylor Swift’s “Karma,” which looks Top 15 bound, and The Weeknd’s “Double Fantasy” f/Future (XO/Epic) moving Top 20. Also joining the Top 20 is Halpern’s Virgin crew with NF’s “HAPPY” (NF Real Music), while Republic’s Kim Petras enters the Top 30 with “Alone” f/Nicki Minaj. Debuting on the chart this week is RCA’s Rothschild and staff with SZA’s “Snooze” (TDE) and Columbia’s Gray bunch with Luke Combs’ “Fast Car” (River House/Columbia Nashville).