We have a new #1 this week at T40, as Taylor Swift's “Look What You Made Me Do” (Big Machine/Republic) ascends to the top. Entering the Top 20 are Dua Lipa's “New Rules” (Warner Bros.), Camila Cabello's “ Havana” f/Young Thug (Syco/Epic) and Ed Sheeran's “Perfect” (Atlantic). Post Malone's “Rockstar” f/21 Savage (Republic) enters the Top 30. Charting this week will be Charlie Puth's “How Long” (Atlantic), Macklemore's “Good Old Days” f/Kesha (Macklemore/Warner Bros.) and ZAYN's “Dusk Til Dawn “ f/Sia (RCA).