Leno, Fallon Sing About NBC's Woes in 'Tonight' Duet

VIDEO: Jay Leno, Jimmy Fallon Sing About NBC's Late-Night Woes With 'Tonight' Duet   Follow @THR on Twitter | Like us on Facebook | Send to a Friend  © 2012 The Hollywood Reporter 5700 Wilshire Blvd. Los Angeles, CA 90069 All rights reserved. Terms of Use | Privacy Policy   unsubscribe from this list | update newsletter preferences |