Top 10 tracks

TOP 10 TRACKS: It was one helluva week for Ariana Grande, whose “Problem” sold like hotcakes and cemented the pint-sized belter’s newly minted status as a pop star. But Ariana wasn’t the only young artist who has just reached critical mass. How about Iggy Azalea’s stunning 1-2 punch, as “Fancy” enjoys a 104% upswing? Those two femmes alone have made the leaderboard compelling again, just as “Happy” finally slips below 200k. And that’s not all, folks. Coldplay’s collab with Avicii has come out of the gate like California Chrome, though it’s way too soon to know whether the track has legs. And rookies Rixton have gone #24-7 behind a 99% jump.

1. Ariana Grande f/Iggy Azalea, “Problem” – 438k
2. Iggy Azalea f/Charlie XCX, “Fancy” – 222k
3. Pharrell Williams, “Happy” – 174k
4. John Legend, “All of Me” – 161k
5. Coldplay, “Sky Full of Stars” – 139k
6. DJ Snake & Lil Jon, “Turn Down for What” – 126k
7. Rixton, “Me and My Broken Heart” – 111k
8. Jason Derulo f/2 Chainz, “Talk Dirty” – 99k
9. Idina Menzel, “Let It Go” – 91k
10. Ed Sheeran, “Sing” – 86k

The biggest movers below the big board were Nico & Vinz’s “Am I Wrong” (#21-16, 77k, +32%) and Brantley Gilbert’s debuting “My Baby’s Guns N’ Roses” (#28, 59k). (5/8a)