Listen to Crazy (Demonstration Version - Includes Lead Singer) online. Crazy (Demonstration Version - Includes Lead Singer) is an English language song and is sung by The Karaoke Channel. Crazy (Demonstration Version - Includes Lead Singer), from the album The Karaoke Channel - In the style of Gnarls Barkley - Vol. 1, was released in the year 2010. The duration of the song is 2:58. Download English songs online from JioSaavn.