The J.B.'s were the most renowned of James Brown's many backing bands (previously, the Famous Flames and the James Brown Band). The band provided musical support for the legendary singer and bandleader for the first half of the 1970s. The band stepped in to fill the shoes of Brown's previous band, who had walked out on him due to his arduous demands. The band's rhythmic foundation was initially provided by drummer Jabo Starks and teenage bass prodigy William "Bootsy" Collins and his guitarist brother Phelps "Catfish" Collins