The Mothers of Invention was an American rock band formed in 1964, led by musician and composer Frank Zappa. Known for their experimental approach, they blended various genres, including rock, jazz, and avant-garde music. Their debut album, Freak Out!, is considered one of the first double albums in rock history and showcased their unique sound and satirical lyrics. The band was notable for its innovative performances and complex compositions. Over the years, the lineup changed frequently, with Zappa being the constant driving force. The Mothers of Invention left a lasting impact on music, influencing many artists and genres that followed.