Finally, after ages, I'm posting. I found some duets which I like, but I'm not sure if you like them too. Hmm, let me just post the videos.
This song is by Kim Dong Wan from Shinhwa and Younha. It's live, so my Dong Wan might not sing well, but it still sounds nice right. :D To me, the song is nice, and they sound nice together. Gee, Younha sounds really nice!
Guess I'll post this video only, because I need to rush off. Sorry, I'll find more duets, hopefully.