The correct answer is I Wanna Hold Your Hand
A surprising 1978 comedy, half lunatic, that tells the story of a group of fans on the day the Beatles went to the Ed Sullivan Show, Beatlemania at its best. The TV show scenes are mixed with Beatles doubles and are very well done, we see the camera man monitor with the real images and the stage in front and in color with the doubles .... it was also the first film produced by Steven Spielberg. The soundtrack, surprisingly, is even with the Beatles.