The Beetles (Herbie)
Really just the Beatles from the "Herbie, Boy Beatle" story of comic book Herbie #5 (Oct.-Nov. 1964).
Herbie Popnecker, the comic superhero Fat Fury, is trying to solve a case where tainted popcorn is causing movie patrons to have whistling come out their ears. Tracking a suspect to a Beetles concert, Herbie puts a mop on his head, abducts Ringo in the middle of "I Want to Hold Your Hand" and takes his place. He then sings his own song and inadvertently becomes the star Eibreh Rekcenpop.
Dean Martin and Frank Sinatra also appear as themselves in the comic.