#7: The Beatles — “Hey Jude” (1968)
Devotes its first three minutes to a traditional piano ballad before launching into a hypnotic, four-minute repeating orchestral singalong outro that took over global radio. Paul McCartney discarded traditional single-length limits by devoting over half the track to a continuous, repeating “Na-na-na” chant. That bold structural gamble created one of the most famous communal anthems in music history.

