by Johnnie Ray was recorded on October 16, 1951. Ray's emotional delivery – he was mistaken for a woman, as well as for a black man – set a template for later vocal styles, and more importantly, showed that music could cross racial barriers both ways by topping the R&B chart as well as the pop chart. "Rock and Roll Blues" by Anita O'Day recorded on January 22, 1952. One of Anita O'Day's few compositions, she was one of the best jazz singers ever, and recorded this blues single on Mercury Records with her own orchestra. "Hound Dog" by Willie Mae "Big Mama" Thornton was recorded on August 13, 1952. A raucous R&B song recorded with Johnny Otis' band (uncredited for contractual reasons), it was written by white teenagers Jerry Leiber and Mike Stoller, covered three years later by Freddie Bell and the Bellboys (Teen Records 101), and then more famously by Elvis Presley. According to Maureen Mahon, a music professor at New York University, Thornton's version is "an important beginning of rock-and-roll, especially in its use of the guitar as the key instrument". "Love My Baby" and "Mystery Train" were recorded by Junior Parker with his electric blues band, the Blue Flames in 1953, "contributing a pair of future rockabilly standards" that later would be covered by Hayden Thompson and Elvis Presley, respectively. For Presley's version of "Mystery Train", Scotty Moore also borrowed the guitar riff from Parker's "Love My Baby", played by Pat Hare. "Gee" by the Crows was recorded on February 10, 1953. This was a big hit in 1954 in the Doo-wop genre, but crossed over to the pop charts, and is credited by rock n' roll authority Jay Warner, as being among "the first rock n' roll records". "Crazy Man, Crazy" by Bill Haley and his Comets, recorded in April 1953, was the first of his recordings to make the Billboard pop chart. This was not a cover, but an original composition, and has been described "the first rock and roll song to be a hit on the pop charts". The Rock and Roll Hall of Fame considers the song "an original amalgam of country and R&B that arguably became the first rock and roll record to register on Billboard's pop chart". "Mess Around" by Ray Charles was recorded in May 1953, one of his earliest hits. The writing credit was claimed by Ahmet Ertegun,