A cartoon series that ran from 1965 to 1969 following the wacky hijinks of The Beatles. Notable for being the first cartoon about actual people made for television. The series followed a Two Shorts Format, with each short separated by two singalong segments. The singalongs would always start with either John Lennon, Paul McCartney or George Harrison trying to introduce the song and encourage the viewers to sing along, and Ringo Starr interrupting to try and "set up the proper mood" with props. YMMV page here