Well you are in luck my friend, cause there are over 1000 songs i know, i didnt realise there was an international thread, but OH WELL, that shows how long i havent been on Gaia.
Might i suggest, Ukiss, Big Bang, Super Junior, 2NE1 and Sistar. These are currently my favourite, although i have many more, since you know Taeyang, and with the sexy body he has, he has so many other songs like the all time famous, Wedding Dress, Only look at me and I'll be there.
Ukiss, sing a lot of, how can i say, Mainstream songs, Like; Neverland, Stop Girl (newly released), Man Man Ha ni, Round and Round, Not Young, Believe and Forbidden love, they're currently my favourite.
Big Bang, my gawd where to start, Haru Haru, Lies, Last farewell, B I G B A N G, Tonight, Beautiful Hangover, Blue, Still Alive, Bad Boy, ER ME GERD, there's just so many with Big Bang.
Super Junior, It's You, Sorry Sorry, Bonamana, Super Girl, Love disease, and many more, (FOREVER AN ELF, i just love super junior too much xD)
2NE1, in the same agency with Big Bang, YG Entertainment, Super badass women, they're songs, UGLY, I am the Best, and LONELY are my favourites from them.
SISTAR, from Starship ent. My Girl (they're most famous song), Alone, and So cool are topping my ipod ;D
Listen to them and see, i am going to make your head filled with kpop xD