The Everly Brothers rock groups of the 1960s. The Beatles, The Beach Boys, and Simon & Garfunkel developed their early styles by performing Everly songs. The Bee Gees, The Hollies, The Marmalade, and other rock and roll groups that feature harmony singing were also influenced by the Everlys. The music of the Everly Brothers influenced the Beatles, who referred to themselves as "the English Everly Brothers" when Paul McCartney and John Lennon went hitchhiking south to win a talent competition. They based the vocal arrangement of "Please Please Me" on "Cathy's Clown." Keith Richards called Don Everly "one of the finest rhythm players."
The Everly Brothers Album sales were also down. The Everlys' first two albums for Warners (in 1960 and 1961) peaked at No. 9 US, but after that, of a dozen more LPs for Warner Bros., only one made the top 200: 1965's "Beat & Soul," which peaked at No. 141. The brothers' dispute with Acuff-Rose lasted until 1964, when they resumed writing and composing as well as working with the Bryant spouses. By then, however, both of the Everlys were addicted to amphetamines. Don's condition was worse: he was taking Ritalin, which led to deeper trouble. Don's addiction lasted three years, until he