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French fashion designer Louis Réard introduced the two-piece bathing suit in 1946, but the design was still seen as risqué when teen idol Brian Hyland released his novelty hit about the yellow polka-dot bikini. Sports Illustrated launched its first swimsuit issue featuring a bikini-clad model in 1964.

Married songwriters Gerry Goffin and Carole King wrote the song, which was sung by Eva Boyd, who was working as a babysitter for Goffin and King at the time.

Released in 1963, the song kicked off the band’s 14-week streak at the top of the charts: After seven weeks, it was knocked off the top spot by the group’s “She Loves You” — which was unseated two weeks later by “Can’t Buy Me Love.” “Hey Jude” spent nine weeks at number 1 on the Billboard charts in the U.S. in 1968, the longest run of any hit by the Fab Four.

The Mamas and the Papas’ husband-and-wife songwriters John and Michelle Phillips initially sold the song to folk singer Barry McGuire as a follow-up to his 1965 hit “Eve of Destruction” — and the Mamas and Papas quartet (which included Cass Elliot and Denny Doherty) initially were hired as backup singers on the track.

“Nowhere Man” was a hit for the Beatles in 1966. Despite the supposed rivalry between the two British rock supergroups, Mick Jagger provided backup vocals on the 1967 Beatles track “Baby You’re a Rich Man.” Paul McCartney and John Lennon returned the favor, singing on the Stones’ song “We Love You.”