iTunes U.S.

DOWNLOAD THIS: If you peeked at the most recent Shazam chart (hosted here), the surge of Jason Derulo's "Talk Dirty" (Warner Bros.) on the iTunes singles Top 10 won't come as a shock. The raunchy Crossover hit featuring 2 Chainz surged #24-9 on the USA tag chart before its leaped into the upper reaches of the download emporium. Some other heavily tagged tunes, notably Aloe Blacc's Beats-ad-driven "The Man" (#109-36) and Pharrell's "Happy," from Despicable Me 2 (#72-34), also loom large here. In other singles news, Katy Perry's "Horse" still leads the pack, Pitbull's "Timber" keeps giving listeners wood, A Great Big World continues to have its "Say" and—oh, Christ, we need a meeting. Anyway, albums! Frozen's hot streak ups the suspense for next week's retail chart, where it could vie for the top spot with frontrunner Columbia's Bruce Springsteen. Meanwhile, two versions of Lorde's Pure Heroine occupy the Top 10. Click the above graphic to make the chart look big, you squinty bastard. (1/17p)