Mexican rock music, often referred to in Mexico as rock nacional ("national rock"), originated in the 1950s. Standards by The Beatles, Elvis Presley, The Everly Brothers, Nancy Sinatra and Chuck Berry, were soon covered by bands such as Los Apson, Los Teen Tops, Los Twisters, , , , Los Rebeldes del Rock, , , and , which later led to original compositions, often in English. The group "Los Nómadas" was the first racially integrated band of the 1950s. Their lead guitarist, Bill Aken (adopted son of Lupe Mayorga, effectively making Aken the cousin of Ritchie Valens), wrote most of their original material, including the raucous Donde-Donde, and co-wrote the material for their Sounds Of The Barrio album, which is still being sold. Their 1954 recording of She's My Babe was the first top 40 R&B re