Last week’s top four sellers are this week’s top four sellers, as Rihanna and Baauer trade slots, the latter now looking somewhat less long-legged than the last viral dance-move sensation from that Korean dude. New to the leaderboard are the third single from P!nk’s latest LP, this one featuring Fun.’s Nate Ruess, zipping upward from #25 a week earlier; Pitbull’s pairing with Christina Aguilera, which goes #11-7; and Imagine Dragons’ steadily building “Radioactive,”  which moves up three slots in its 33rd week of availability.

1. Macklemore & Ryan Lewis, “Thrift Shop” – 305k
2. Bruno Mars, “When I Was Your Man” – 240k
3. Rihanna f/Mikky Ekko, “Stay” – 236k
4. Baauer, “Harlem Shake” – 185k
5. Justin Timberlake f/Jay-Z, “Suit & Tie” – 151k
6. Drake, “Started From the Bottom” – 128k
7. Pitbull f/Christina Aguilera,” Feel This Moment” – 125k
8. P!nk f/Nate Ruess, “Just Give Me a Reason” – 122k
9. Imagine Dragons, “Radioactive” – 111k
10. Demi Lovato, “Heart Attack” – 107k

Nipper is flexing his muscles, as four RCA stars—Justin Timberlake, Pitbull/Xtina and P!nk—combine for three Top 10 entries. [HitsDailyDouble]