Yiruma - River flows in you
Yiruma is the stage name of Lee Ru-ma (born February 15, 1978), an internationally-known pianist and composer from South Korea. He began playing the piano at the age of five and moved to London when he was eleven, in 1988, to study at The Purcell School of Music. Yiruma frequently performs at sold-out concerts in Asia, Europe and North America and among his most popular pieces are "River Flows in You", "Kiss the Rain" and "May Be". Yiruma's most popular album, First Love was released in 2001.
This is an amazing song that I hear when I'm feeling down or really concentrated in something.