Top 10 tracks

TOP 10 TRACKS: The week's best sellers are led by Ariana Grande's Iggy Azalea-assisted"Problem" (Republic), which confirms the pint-sized diva's starlet status. Both the chart-topper and Iggy’s own “Fancy” (Grand Hustle/Def Jam) were up (5% and 8%, respectively), as these two youngsters manifest a 21st century brand of grrrl power. It was also a good week for Columbia, which has the other three records in the Top 5. Capitol’s 5 Seconds of Summer has the week’s highest-charting debut by several kilometers with the power-poppy "Don't Stop." And Warner Bros. breakthrough act Jason Derulo has two entries on the big board, with the Snoop Dogg collab “Wiggle” looking like it could be as big as or bigger than “Talk Dirty” when all is said and done.

1. Ariana Grande f/Iggy Azalea, “Problem” – 248k
2. Iggy Azalea f/Charlie XCX, “Fancy” – 234k
3. John Legend, “All of Me” – 130k
4. Pharrell Williams, “Happy” – 174k
5. DJ Snake & Lil Jon, “Turn Down for What” – 121k
6. Nico & Vinz, “Am I Wrong” – 115k
7. Michael Jackson, “Love Never Felt So Good” – 109k
8. Jason Derulo f/Snoop Dogg, “Wiggle” – 109k
9. 5 Seconds of Summer, “Don’t Stop” – 91k
10. Jason Derulo f/2 Chainz, “Talk Dirty” – 85k

The biggest gainer in the Top 25 is “Rude” from RCA’s Magic!, which went #34-15 with 74k for a +57%. This one looks primed to pop, so to speak. (5/22a)