After debuting at No. 1 last week with "Empty," YG Entertainment's new boy band WINNER have been dethroned by Jang Bum Joon. The former Busker Busker guitarist and vocalist slides in at No. 1 with "Difficult Woman," pushing WINNER to second place.

Newbie Park Boram is showing a lot of longevity with her first single "Beautiful," which is down just one spot to No. 3, while SHINee's Taemin makes a solid solo debut with "Danger" at No. 5.

Veteran girl group KARA, who recently lost two members and gained a new one, arrive at No. 17 with their new single "Mamma Mia." This is weak compared to the group's usual chart ranking, but when you take into consideration that they just reshuffled their lineup, as well as the fact that "Mamma Mia" seems to be holding up on the various real-time digital charts, a top twenty debut really isn't too shabby at all.

A few spots lower is Orange Caramel's "My Copycat," which enters at No. 22. This is the trio's lowest-charting single ever, but lately the K-pop charts have been more about longevity than one-week peaks, so we'll see how this does in the long run.

Speaking of girl groups with low charting singles, SECRET's "I'm In Love" plummets to No. 29 after debuting at No. 14 last week, while poor Sunny Hill just flopped beyond belief with "Monday Blues" at No. 96.

However, even Sunny Hill can't match STELLAR in flopping, with the controversial girl group's new single "Mask" missing the top 100 altogether. STELLAR were never big on the charts to begin with, but they did score a surprise top forty hit earlier this year with the amazing "Marionette," so it's sad to see that the equally-as-good "Mask" has failed to continue their winning streak.

Check out this week's new K-pop hits, below.

No. 1. Jang Bum Joon - Difficult Woman

No. 5. Taemin - Danger

No. 17. KARA - Mamma Mia

No. 22. Orange Caramel - My Copycat

No. 96. Sunny Hill - Monday Blues

No. ???. STELLAR - Mask

SISTAR have hung onto the No. 1 spot for a second week with their latest single, "Touch Your Body." The song is still sitting comfortably at No. 1 on the Melon digital music chart, too, so we could potentially see the quartet spend a third week at the top of the Gaon chart. If that happens, then "Touch My Body" will become the longest-running No. 1 in almost two years.

Overall, "Touch My Body" is SISTAR's fifth No. 1 as a full group, and their 11th if you include their subunit, solos, and collaborations. It's this kind of success that's helped them become Korea's second biggest girl group -- after Girls' Generation, of course.

In second place is Block B's "Her," which climbs one spot to No. 2 this week. It's the highest-charting song of Block B's career, and its success is pretty impressive by boy band standards. Male artists generally tend to fare better with physical album sales, while the digital market is dominated by girl groups and OST ballads.

HyunA's racy "Red" debuts at a solid No. 3, matching the position of her signature hit, "Bubble Pop!," but failing to reach the No. 1 and No. 2 peak of both "Ice Cream" and "Change."

INFINITE's flawless "Back" slips two spots to No. 4, followed by Girl's Day's "Darling" at No. 5.

JYJ's new single "Back Seat" debuts at No. 6, while all the songs from their latest album, Just Us, are scattered throughout the rest of the top 100.

Further down, Wonder Girls' Yenny, who now goes by the bizarre and confusing name of HA:TFELT, enters at a respectable No. 16 with her first solo single, "Ain't Nobody." The position pales in comparison to her ex-bandmate Sunmi, but is relatively decent by solo female standards, putting her on par with T-ara's Jiyeon and Hyomin.

The new HIGH4 single with Lim Kim, "A Little Close," enters at No. 29, while Sunny Hill's "Once In Summer" arrives at No. 47 to become their lowest-charting single ever.

Speaking of flops, BESTie's "Hot Baby" debuts at a disappointing No. 53. Although this matches "Thank U Very Much" as their highest-charting single, it's still a let down for the group, who should be doing much better at this point.

Check out this week's key K-pop hits, below.

No. 1. SISTAR - Touch My Body

No. 3. HyunA - Red

No. 4. INFINITE - Back

No. 6. JYJ - Back Seat

No. 16. HA:TFELT - Ain't Nobody

No. 53. BESTie - Hot Baby

Frozen fever is in full effect, and absolutely nobody is safe -- not even the K-pop world. The signature song from the Disney blockbuster, "Let It Go," performed by Idina Menzel, enters South Korea's official singles chart at No. 1 this week, while a second version of the song rises to No. 4. Additionally, the Demi Lovato version is also charting at No. 54.

Apparently, this is the first time in the history of the Gaon chart that a foreign, English-language song has topped the charts. The vast majority of all the music that charts in Korea is Korean, so it's rare for foreign songs to even crack the top 100, let alone reach No. 1, so this is a HUGE achievement for Frozen.

Last week's No. 1 single, Hyorin's "Hello," falls one spot to No. 2, while Ga-In's comeback track, "Fxxk U," enters at No. 3. This makes "Fxxk U" Ga-In's fifth top three single as a lead artist, further solidifying her status as one of K-pop's top female soloists.

Girl's Day's "Something" holds strong at No. 6, while Rain's sleeper hit, "La Song," rises one spot to No. 8. Both songs have shown a lot of longevity, which can also be said for AOA's "Miniskirt," which climbs one spot this week for a new peak of No. 11.

SPICA's "You Don't Love Me" debuts at No. 16 to become the second highest-charting song of their career so far ("Tonight" reached at No. 10 last year), while TVXQ's sassy "Something" slips to No. 17.

Sunny Hill's "Don't Say Anything" manages to rise ten spots to No. 24, but the increase isn't enough to save it from being the group's lowest-charting single since relaunching in 2011 with "Midnight Circus."

Both Rainbow Blaxx and Dal Shabet fall five spots each this week: "Cha Cha" is down to No. 25, while Dal's "B.B.B." slips to No. 32.

Check out this week's new K-pop hits, below!

No. 1. Idina Menzel - Let It Go

No. 3. Ga-In - Fxxk U

No. 11. AOA - Miniskirt

No. 16. SPICA - You Don't love Me

No. 24. Sunny Hill - Don't Say Anything