Girls' Generation's Seohyun performed alongside genius child pianist Yoo Ji Min on February 16th's 'Star King'.
Despite not being able to see, Yoo Ji Min was able to develop amazing piano skills, playing Beethoven's "Moonlight Sonata" by the age of four.
Seohyun, who was incredibly touched by the young pianist, stated, "I don't think Ji Min's song is regular music. It's hope and love."
Watch Yoo Ji Min and Seohyun's performance of "Magic Castle" below!