Bill Cosby Can't Play Piano, But Does Anyway 1.24K Kate Shapiro 12/07/10 01:09PM Filed to: The Tonight Show The Tonight Show Bill Cosby Music TV Video Bill Cosby was on the Tonight Show last night and to commemorate the occasion he, inexplicably, played a piano solo with the Leno's band. Watch as Bill Cosby rambles nonsensically and then spastically hits random piano keys.[There was a video here]