"It's Now or Never" is a song recorded sa pamamagitan ng Elvis Presley and released as a single in 1960. The song is one of the best-selling singles sa pamamagitan ng Presley (20 million copies), and one of the best-selling physical singles of all time
"That's All Right Mama" is a song written and originally performed sa pamamagitan ng blues singer Arthur Crudup and recorded in 1946. It "stands as a convincing front-runner for rock ‘n’ roll’s ground zero", according to one pinagmulan
