Over on the Digital Songs chart, Katy Perry trots up three slots to No. 1 with "Dark Horse," featuring Juicy J, selling 243,000 downloads for the week (up 6%). The single, which is the third release from her "PRISM" album, is making great gains at radio. This week, it climbs 15-11 on the Pop Songs airplay chart (known as Mainstream Top 40 on Billboard.biz). Perry's previous single, the ballad "Unconditionally," topped out at No. 15 on the Digital Songs chart. Last week's leader, Pitbull's "Timber," featuring Ke$ha, drops to No. 2 with 227,000 (down 25%). A Great Big World & Christina Aguilera's "Say Something" falls 2-3 with 218,000 (down 10%). OneRepublic's "Counting Stars" slips 3-4 with 185,000 (down 22%). Eminem's "The Monster," featuring Rihanna, is stationary at No. 5 with 162,000 (down 27%). Passenger's "Let Her Go" is also a non-mover at No. 6 with 146,000 (down 21%). Aloe Blacc's "The Man" re-enters the chart at No. 7 with 139,000 (up 191%) thanks to the song's use in TV commercials for Beats by Dre. The spots, which have been airing since November, have recently earned huge exposure during the NFL playoffs. The first Beats commercial with "The Man" featured basketball player Kevin Garnett. Then, a second clip, starring San Francisco 49ers' quarterback Colin Kaepernick, began running in December. The latter spot was widely seen during the 49ers' Jan. 12 gameagainst the Carolina Panthers, and is the catalyst for "The Man's" sales gain this week. Lorde's "Team" hits the top 10 for the first time, rising 13-8 with 125,000 (up 6%), and Bastille's"Pompeii" also reaches the top 10, rising 14-9 with 124,000 (up 9%). Idina Menzel, who voices one of the lead characters in Disney's "Frozen" film, hits a new high, as her version of the movie's "Let It Go" climbs 12-10 with 118,000 (down 9%). Another rendition of the song, by Demi Lovato, slides 25-36 with54,000 (down 31%). Menzel's performance of the song is the one featured in the movie, while Lovato's take plays over the film's closing credits.

1. Katy Perry f/Juicy J - "Dark Horse" 243,000 (1,712,000)
2. Pitbull f/Ke$ha - "Timber" 227,000 (2,507,000)
3. A Great Big World & Christina Aguilera - "Say Something" 218,000 (2,085,000) 2x Platinum
4. OneRepublic - "Counting Stars" 185,000 (3,415,000)
5. Eminem f/Rihanna - "The Monster" 162,000 (2,607,000)
6. Passenger - "Let Her Go" 146,000 (2,497,000)
7. Aloe Blacc - "The Man" 139,000
8. Lorde - "Team" 125,000
9. Bastille - "Pompeii" 124,000
10. Idina Manzel - "Let It Go" 118,000

"Dark Horse," featuring Juicy J, selling 243,000 downloads for the week (up 6%).

ARE YOU READY FOR, READY FOR
A PERFECT STORM, PERFECT STORM?!