Los Pekenikes

Spanish pop band, mainly playing instrumental music, founded in 1959 by brothers Lucas Sáinz (lead guitar), later ed by 3 friends from their school, Instituto Ramiro de Maeztu in Madrid, Ignacio Martín Sequeros (contrabass, electric bass and harmonica), Pepe Nieto (drums) and Eddy Guzmán (vocals).
Later multiple musicians have played on the band, as Ignacio Martín Sequeros, Juan Pardo, Junior, Felipe Alcover, José Barranco, Tony Luz, Jorge Matey, Felix Arribas, Vicente Gasca, or even Luis Eduardo Aute, covering English songs and later composing their own melodies.

Their first big hit was "Los Cuatro Muleros". In June 1965 they opened for The Beatles concert in Madrid.