Murray the K shares writing credit with his mother and Bobby Darin for Darin’s breakout song, “Splish Splash“
Wikipedia on Murray the K:
“The Fifth Beatle”
“Murray the K reached his peak of popularity in the mid-1960s when, as the top-rated radio host in New York City, he became an early and ardent supporter and friend of The Beatles. When the Beatles came to New York on February 7, 1964, Murray was the first DJ they welcomed into their circle, having heard about him and his Brooklyn Fox shows from American groups such as the Ronettes (sisters Ronnie and Estelle Bennett and their first cousin Nedra Talley). The Ronettes met the Beatles in mid January 1964, just a few weeks before, when the Harlem-born trio first toured England (the Rolling Stones were the group’s opening act). The Beatles and Decca Records (distributor of Philles Records, the Ronettes’ U.S. label) jointly threw the Ronettes a welcome party in London. When the band arrived in New York, Murray was invited by Brian Epstein to spend time with the group, and Murray persuaded his radio station (WINS) to let him broadcast his prime time show from the Beatles’ Plaza Hotel suite. He subsequently accompanied the band to Washington, D.C. for their first U.S. concert, was backstage at their The Ed Sullivan Show premiere, and roomed with Beatles guitarist George Harrison in Miami, broadcasting his nightly radio shows from his hotel room there. He came to be referred to as the “Fifth Beatle“, a moniker he said he was given by Harrison during the train ride to the Beatles’ first concert in Washington, D.C. or by Ringo Starr at a press conference before that concert. (However, in The Beatles: The First U.S. Visit he is seen christening himself thus in a phone conversation with the Beatles on the morning of their arrival in New York). His radio station WINS picked up on the name and billed him as the Fifth Beatle, a moniker he came to regret. He was invited to the set of A Hard Day’s Night in England and made several treks to England during 1964, giving WINS listeners more Beatle exclusives.
Murray the K 1964
https://youtu.be/wyvHW5z0S7k