Oh god, there is so many songs I considered beautiful. xD But I'll mention one of the many so it won't be freakishly long post.

Eternal Morning [Tablo + Pe2ny] - White [The MV got banned in South Korea, I think. It got an 19+ rating because of the man's suicide at the end. But we don't see him hanging. o_O]

It's so deep, profound, and hauntingly beautiful. It has no lyrics, purely instrumental with it's smooth urban beats, wonderful string arrangement and jarred sounds. It gives the listener free of emotion and thought without being forced to feel through lyrical context. Man, I was blown away from the whole album in general and it's one of my favorite albums. xD I have to listen to it several times every day. And it's pretty creative, a 'soundtrack to a lost film'. It's suppose to be background music for a movie that doesn't even exist. But I come to gradually realize it's a soundtrack to life. Life is the 'lost film'.