Gladys Knight & the Pips routines that became a signature of the Pips' stage presentation; Atkins later described his working and personal relationship with the group in his autobiography, "Class Act: The Jazz Life of Choreographer Cholly Atkins": "The one thing that I was pleased about was a stipulation in my contract that allowed me to keep working with Gladys Knight & the Pips as personal clients even though I would be an employee of Motown Records. To tell the truth, Gordy wasn't too happy about it at first, but this is something that I would not compromise under any circumstances. By that time, Gladys
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