http://www.youtube.com/watch?v=O7mophS2-1c
Paul McCartney was featured on the TV show of Jimmy Fallon and together they sang there a very funny a cappella version of «Yesterday", as we can see.
To many it will seem a "sacrilege" and to others something funny, but the truth is that McCartney has no complexes in laughing at himself and that is the interesting thing.
The former Beatle also took the opportunity to remember on the program to John Lennon, of whom two days ago was the 30th anniversary of his murder.