Mustang on The Masked Singer (US, Season 9) was revealed to be country music star Sara Evans.

Quick answer

  • The Mustang costume hid multi‑platinum country singer Sara Evans, unmasked during the Season 9 premiere after losing a Battle Royale to Medusa.
  • She performed “Here I Go Again” by Whitesnake before being eliminated and taking off the mask.

A bit more context

  • The episode showed Mustang as a fiery, leather‑and‑flames themed character, with clues about selling out arenas, winning awards, and even “collaborating with Elvis,” all pointing toward Evans’ long country career.
  • When she was unmasked, outlets and fan forums quickly confirmed that Mustang was Sara Evans, and she has since been listed in Season 9 reveal roundups under that identity.

Information gathered from public forums or data available on the internet and portrayed here.