ZE:A's Siwan showed his love for fellow member Hyungsik,�who turns 22 (Korean age) today, with the happy birthday song!

Although his skills on the guitar are not exactly smooth, it seems the singer has taken the time to learn a few chords in attempts to make his birthday serenade a little more special. It is after all, the thought that counts, and Hyungsik will surely appreciate the sweet gesture!

Happy birthday Hyungsik!