William Close returned to The World's Best stage with his Earth Harp for a medley with a beautiful twist on The White Stripes' Seven Nation Army.

Tonight the World's Best on CBS will feature the Battle Round with William Close & his Earth Harp going up against Naturally 7.

Tune in next Wednesday, Feb 13th at 8 pm ET/PT to The World's Best on CBS to watch William Close's performance with The Earth Harp.

William Close performs at the Inaugural Ball for Governor JB Pritzker, as Pritzker is sworn in as 43rd Governor of Illinois.