Ah, cool! A K-Pop thread! Yeah, I'll toss my hat in the ring here. I went through the list here and it's not bad at all...Girl's Generation is pretty much a cornerstone to enjoyment of this genre. Maybe I can help you find a few more songs seeing as I live in Korea (not Korean though) and get to hear the new stuff pretty regularly walking around. Here's a couple of my favorites, older and newer:
CNBlue - Can't Stop
https://www.youtube.com/watch?v=75KBwVtd_W0
UI - You & I
https://www.youtube.com/watch?v=NJR8Inf77Ac
K.Will - Day 1
https://www.youtube.com/watch?v=9KVVPxexz1c
So You & Jung Gi Go - Some https://www.youtube.com/watch?v=Y-FhDScM_2w
AOA - Dan Bal Muh Li (Short Hair) https://www.youtube.com/watch?v=N5wzkQvzp4c
There's a few I like quite a bit... got a rather extensive list. I never really cared for K-Pop when I first got here but it grows on you, pretty awesome stuff after a while. Helps after you learn the language a bit too, so if you need help understanding/reading some Hangeul, let me know, I might be able to help