TAG, THEY'RE IT

Roc Nation's Rihanna (with Kanye West and Paul McCartney) is the biggest gainer on Shazam's USA Top 100 tags chart, as "FourFiveSeconds" flies 169 spots.

Other big jumpers include "Chains" by Island's Nick Jonas, cuts from RCA's Kid Ink ("Hotel") and Walk the Moon ("Shut Up and Dance") and The Weeknd's "Earned It" (from Republic's very naughty Fifty Shades of Grey ST).

Speaking of Fifty Shades, the Sia track from that set, "Salted Wound," is starting to make noise at iTunes; expect a Shazam reaction soon.

Meanwhile, 222/Interscope's Maroon 5 move into the Top 10 rankings with "Sugar."

On the U.K. side, indie rocker Allman Brown's "Foolish Love" is catapulted to biggest-gainer status thanks to a big TV placement, while Maroon's "Sugar" and Kelly Clarkson's "Heartbeat Song" also make huge strides.

You can check out both tags charts (sortable by rank, artist and biggest jumps), as well as Shazam's Future Hits USA and U.K. rundowns, under "The Vibe" at the top of the home page.

Next week, we predict a substantial impact by alt-rock indie Joel Jerome's "Everybody Wants Somebody," following an end-titles sync on Girls.