Following a rather unimpressive debut at No. 30 on the GAON chart for 4minute's sub-unit, 2YOON, the duo's country-tinged single, "24/7," has shot up 22 places to No. 8 in its second week out. While 2YOON's success is miles away from that of bandmate HyunA's, a slot in the top ten is a respectable achievement and at the very least stops them from being labelled flat-out flops. (Like, say, the trainwreck that was Rainbow Pixie.)

A few spots down, K.Will's collaboration with Electroboyz's rapper Chakun, "Even If You Play," makes a solid debut at No. 13. Although the song is just a one-off digital single that isn't being actively promoted, a high chart placement was still expected. K.Will's been on fire for the past year, and with hit producer Brave Brothers behind him, "Even If You Play" was destined to do well.

One spot lower at No. 14 is "Sweet Dream" by MFBTY, the collaboration group between married hip-hop couple, Tiger JK and Tasha, and their labelmate, Bizzy. The song marked a move into more mainstream territory for the trio, and judging by the song's strong debut, it's paid off.

Nine Muses also make their debut this week with their comeback single, "Dolls," which enters at No. 35. It's not the huge debut we originally predicted, but considering that "Dolls" was unable to benefit from a full week of sales, there's still a chance that it could climb a few spots next week and out-peak "Ticket" as their highest-charting single.

In the top five, indie hip-hop duo, Bae Chi Gi, remain at No. 1 for another week with their Ailee collaboration, "Shower of Tears." Funnily enough, another famous indie hip-hop duo, LeeSsang, debut at No. 4 with their song, "Tears," which also happens to feature guest vocals from a female songstress (The SeeYa's Yoojin). LeeSsang's "Tears" looks like a lock for next week's No. 1, unless SISTAR19 knock out some seriously explosive first-week sales with their just-released new single, "Gone Not Around Any Longer," which they very well could.

To wrap up this week's roundup, Sunny Hill have finally left the top ten with their hit "Goodbye to Romance." The song slips 10-12 this week following a month-and-a-half in the top ten, which in K-pop time, is almost an eternity -- especially for a group like Sunny Hill. Not only is "Goodbye to Romance" the group's biggest single to date, it's one of the most successful tunes of the past six months. Not bad for a group that looked like it was heading towards complete irrelevance only two years ago.

No. 1 - Bae Chi Gi feat. Ailee - Shower of Tears

No. 8 - 2YOON - 24/7

No. 13 - K.Will & Chakun - Even If You Play

No. 14 - MFBTY - Sweet Dream

No. 35 - Nine Muses - Dolls