Charity gala revenge showdown

Scene: A top-tier charity gala, a highly sought-after pianist heiress is performing. Motivation: A woman with a disfigured face, sitting in a wheelchair, is pushed onto the stage, publicly exposing the glamorous "heiress" on stage as an impostor who swapped lives with her years ago and set a fire to burn her to death. Visual: (Do not resemble any celebrity faces, must be non-existent people in reality).