Video to Watch: Manny Pacquiao and Will Ferrell sing John Lennon's "Imagine" on Jimmy Kimmel Live!

Filipino boxing superstar Manny "Pacman" Pacquiao has guested, for the third time, on Jimmy Kimmel Live! and as expected he sang again. But this time in a duet with Hollywood comedy superstar Will Ferrell.

Watch Manny and Will sang the John Lennon hit "Imagine" below:

Pacman first guested on the show last November 2009 where he sang Dan Hill's "Sometimes When We Touch" and in March 2010, he again guested on the show and performed George Benson's "Nothing's Gonna Change My Love For You".