6. Be-Bop-a-Lula, a rockabilly song recorded on May 4, 1956 by Gene Vincent and His Blue Caps and released on May 22, 1956. The song peaked at No. 7 on the US Billboard pop music chart and in April 1957 the record company announced that over 2 million copies had been sold to date. Gene Vincent was s rock and roll musician who pioneered the style of rockabilly.