What does it take to stop (or at least slow down) the juggernaut that is the "Frozen" soundtrack? Only Pharrell, Katy Perry, Lorde, Jason DeRulo, Lil Jon, Miley Cyrus, Kid Ink and Aloe Blacc. In other words, after a smokin' 13 record-setting weeks at #1, "Frozen" finally got knocked down a notch by the NOW 50 hits compilation.

Now That's What I Call A Debut

NOW 50 slammed into the #1 spot thanks to sales of 153,000, according to figures provided by Nielsen SoundScan. With its star firepower, the compilation easily bested "Frozen," which slipped down to #2 (99,000) as sales blew past 2.6 million.

Welcome To The Party

The Billboard 200 top 10 was full of fresh faces, with four other albums joining NOW in the winner's circle. Country cutie Hunter Hayes slid in at #3 with his second effort, Storyline, which moved 69,000 copies for his best debut to date, though not quite enough to pass "Frozen."

Over on the iTunes chart, though, Hayes actually beat out NOW and "Frozen" to take the #1 spot.

Also debuting: Tech N9NE's Strangeulation (#5, 36,000), indie rapper Atmosphere's Southsiders (#8, 23,000) and guitar icon Santana's all-star comp Corazon (22,000).

Just outside the top 10, Lily Allen made a quieter noise with Sheezus, which slid in at #12 (17,000).

Ariana And Iggy Hold It Down

After rolling to the #1 spot on the Billboard Digital Songs chart last week, Ariana Grande's "Problem" stayed put (235,000), while partner Iggy Azalea also hung in at #2 with "Fancy" (216,000). The rest of the top 5 was also mostly the same: Pharrell Williams' "Happy" (#3, 156,000), John Legend's "All of Me" (#4, 144,000) and DJ Snake and Lil Jon's "Turn Down For What" up one to #5 (130,000).

Michael Jackson and Justin Timberlake's "Love Never Felt So Good" shot up nine spots to #6 thanks to its first full week of sales (101,000), but it was Jason DeRulo's "Wiggle" that had the biggest week, zooming 29 slots to #7 (94,000).