Complex sentence: In 1967, Lavoe joined Willie Colón's band as the its vocalist recording several hit songs, including "El Malo" and "Canto a Borinquen".
Split into simpler sentences: In 1967, Lavoe joined Willie Colón's band and performed as the band vocalist. With the Willie Colón band, Lavoe recorded several hit songs, including "El Malo" and "Canto a Borinquen".