Les Claypool is an American musician, songwriter and producer best known as the founder, lead vocalist and bassist of the influential alternative rock band Primus. Renowned for his virtuosic, slap-heavy bass style and experimental approach, Claypool is widely regarded as one of the most distinctive and innovative bass players in modern rock. His work blends funk, metal, psychedelia, progressive rock and avant-garde elements. Claypool’s side projects include the psychedelic collaboration The Claypool Lennon Delirium and the improvisational, jam-leaning Fearless Flying Frog Brigade.