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 Hitters, Los Nómadas, Los Rockets, , Los Locos del Ritmo, , and Javier Bátiz, 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 recording by a Latino band. In the southwestern United States, Spanish guitar rhythms and Mexican musical influences may have inspired some of the music of American musicians Ritchie Valens, Danny Flores (of The Champs), Sam the Sham, Roy Orbison and later, Herb Alpert. Initially, the public exhibited only moderate interest in them, because the media attention was focused on "La Ola Inglesa" (British Invasion).