Will Ferrell loves to serenade the American people with delicious tunes from the past. We’ve heard him take on Kansas’ “Dust in the Wind” in Old School, and Bocelli’s “Por Ti Volare” with Prestige Worldwide in Step Brothers. Now he’s back with a fantastic rendition of John Lennon’s famous anthem “Imagine.” But that’s not where the story ends. This performance, which happened on Jimmy Kimmel Live, is a duet with famed boxer Manny Pacquiao. Why a boxer? Because it’s hysterical to hear someone sing who is trained in the art of beating peoples’ asses. While Ferrell, the songbird of his generation, is truly an inspiration to the song, Manny steals the spotlight with his amazing voice and keen sense of pitch (if you can’t pick up on the sarcasm here, then you don’t deserve to laugh at this terrific piece of music). Watch the video after the jump.