Question: who are all the celebrities on the masked singer?
Answer: T-Pain – series 1 winner. ...  Rumer Willis – series 1. ...  Gladys Knight – series 1. ...  Donny Osmond – series 1. ...  La Toya Jackson – series 1. ...  Joey Fatone – series 1. ...  Ricki Lake – series 1. ...  Wayne Brady - series 2 winner.