Sgt. Pepper's Lonely Hearts Club Band (Yellow Submarine)
In the 1968 animated movie Yellow Submarine, four old fashioned string quartet or brass band or whatever musicians play on a gazebo in Pepperland spreading peace, love and all that bull. Then the Blue Meanies attack and it all hits the crapper. The Beatles are immediately called in (of course) to save the day. Forced to impersonate the band, they turn out to be dead ringers for 'em. What are the odds!?
Trivia Time! The roles of the Beatles were not voiced by the Beatles. What a freaking ripoff. Paul Angelis did Ringo's voice; John Clive, John; Geoffrey Hughes, Paul; and Peter Batten, George.