Gladys Knight & the Pips Knight & the Pips embarked on their final tour in 1988 and disbanded upon its conclusion, as Gladys Knight decided she wanted to pursue a solo career, ending a 37-year tenure. Following the group's amicable disbandment in 1989, Edward Patten and William Guest formed their own production company in Detroit, titled Guest and Patten Productions, later renamed the Crew Entertainment Company. Patten was diagnosed with diabetes, which led to amputations on his legs and being confined to a wheelchair. He later died of complications from the disease on February 25, 2005 in Livonia, Michigan. William Guest continued to lead the
Backing vocalist and even developing highly complex harmonies and arrangements. When they perform live, they may have backing vocalists who impersonate their voices. Some bands use backing vocals in order to contrast with the lead singer who may be performing an unusual vocal technique. For example, Brian "Head" Welch, the lead guitarist of the band Korn, performed backing vocals on several songs, and notably on the song "Ball Tongue", he screams the chorus while lead vocalist Jonathan Davis sings incomprehensible scat vocals. Similarly, the Canadian deathcore group Despised Icon uses two vocalists, one performing screams and another performing low, growling death grunts