Rolling Stone Grimes, Alanis Morissette, Will.i.am to Judge ‘Alter Ego’ Reality Singing Competition Unknown singers to perform as avatars in futuristic-sounding series By Grimes, Alanis Morissette, and Will.i.am will serve as judges on the upcoming reality singing series Alter Ego, Fox announced Friday. A spin on The Masked Singer concept — where celebrities perform wearing ostentatious costumes to hide their identity — Alter Ego will feature unknown singers performing as their “dream avatar” thanks to motion capture and visual effects technology, Alter Ego premieres this fall in a Wednesday programming block alongside The Masked Singer. Alter Ego marks the first reality singing competition appearance for Grimes, whose interests and music often intersect with futuristic things like AI technology and NFTs.