The mouse character on the most recent season of "The Masked Singer" is Demi Lovato, performing as "Anonymouse." She wore a fiery red tulle dress with a spiky black jacket and a mouse costume with light gray fur and soft pink ears. This reveal occurred in the 2023 season special, where the judges and audience guessed the mouse might be Demi Lovato among other big stars.
In an earlier season (Season 3, 2020), the character Mouse was portrayed by singer Dionne Warwick, who wore a mouse costume including a full head-covering mask. However, the most recent prominent mouse figure in the show is Demi Lovato as Anonymouse.
