Kygo and Selena Gomez earn first #1 hit with "It Ain't Me", Little Mix joins the top 10.

On it's 9th week charting "It Ain't Me" moves up to #1, becoming the first chart-topper for both Kygo (previous high-point: "Firestone" at #29) and Selena Gomez (who had reached #2 with "Good For You" and her feature on "We Don't Talk Anymore").

Kygo and Selena dethrone Dua Lipa's "Be The One" which remains tied with "Shape of You" and "Chained to the Rhythm" for most weeks at #1 this year, each with three. "Shape" is down three spots to #7, while "Chained" likewise slips three spots to #10. But not everything is bad news for Dua this week.

Last week's Greatest Gainer, "Scared to Be Lonely" improves five more spots to #3. It's already Martin Garrix's highest rank to date. Dua has visited the top spot twice with "No Lie" and the aforementioned "Be The One". In the process it passes Jax Jones and Raye's "You Don't Know Me", which ranks at #4 but remains bulleted.

Calvin Harris earns a third consecutive top 5 hit as "Slide" improves four spots and ranks at #5 this week. It's Frank Ocean and Migos' first chart entry. Former #1 "Symphony" is stable at #6.

Two tracks enter the top 10 this week: Last week's top debut, Little Mix's "Touch", featuring Kid Ink, jumps to #8. It's their first top 10 hit. For Kid Ink it follows his feature on Fifth Harmony's six-week #1 hit "Worth It". Also, after reaching #10 a few weeks ago, Bruno Mars' "That's What I Like" earns a new peak by ranking at #9 this week.

Starley's "Call On Me", which is charting on a remixed version by Ryan Riback, jumps eight spots to #14 on it's second week. Anne-Marie's "Ciao Adios" also earns a new high-point by jumping six rungs to #13. Little Mix follows their first top 10 hit with a #18 debut for "No More Sad Songs", the week's highest debut. It's also Machine Gun Kelly's first chart entry, but not his only song on this week's chart. The week's Greatest Gainer is "Heatstroke", Calvin Harris' collaboration with Young Thug, Pharrell Williams and Ariana Grande, which moves up 9 spots to #19.

Halsey also debuts her first single since "Closer", with "Now Or Never" opening at #21. Camila Cabello and Machine Gun Kelly are just behind with "Bad Things" at #22. The opening song for HBO's Big Little Lies, Michael Kiwanuka's "Cold Little Heart" also debuts at #26.