The Beatles' 'Yesterday' is officially the most covered song in the history of recorded music. According to Guinness World Records, there are over 2,200 known versions by different artists, ranging from Frank Sinatra to Elvis Presley. Paul McCartney famously wrote the melody in a dream and originally used the placeholder lyrics 'Scrambled eggs, oh my baby how I love your legs' to remember the tune. The song marked a significant turning point for The Beatles; it was the first time a single member (McCartney) recorded a song alone, accompanied only by a string quartet. George Martin, the band’s producer, had to convince McCartney that strings wouldn't make the song sound too 'classical.' The track reached number one in the US and remains a cornerstone of the Lennon-McCartney songwriting legacy, despite being entirely a McCartney composition.