The Mad Scientist Monster on The Masked Singer (Season 13) was revealed to be country singer Brian Kelley , best known as one half of Florida Georgia Line.

Quick Scoop: Who Is Mad Scientist Monster?

  • The Mad Scientist Monster is Brian Kelley, American singer and songwriter.
  • He’s famous for being one half of the country duo Florida Georgia Line, alongside Tyler Hubbard.
  • On The Masked Singer Season 13, he performed under the Mad Scientist Monster costume and made it all the way to the finale before being unmasked.

How The Show Revealed Him

  • In the Season 13 reveal segment, the mask comes off and Brian Kelley is announced as the celebrity behind Mad Scientist Monster.
  • The clue packages repeatedly hinted at:
    • A successful country music career.
    • Ties to Florida Georgia Line, including references to their song with Bebe Rexha, “Meant to Be,” and the album “Life Rolls On.”
* A background in sports and a connection to Tennessee.

Fun Clue Details Fans Noticed

  • Visual clues like:
    • A badge with two bees, nodding to “Meant to Be” and Bebe Rexha.
* A “Love Yourself” sign and references to life “rolling on,” echoing Florida Georgia Line themes.
  • Personal hints:
    • Talking about meeting and loving his wife, plus references to their “fur babies.”
* Mentioning being an athlete-turned-singer, which matches Kelley’s baseball background.

Performances As Mad Scientist Monster

Some standout songs he performed under the mask included:

  • “Unwell” by Matchbox Twenty.
  • “I Swear” by All-4-One on Boy Band Night.
  • “There’s Nothing Holdin’ Me Back” by Shawn Mendes on Lucky 6 Night.

These performances, plus the country clues, steadily pushed fan and panel guesses toward a country star identity.

TL;DR: If you’re wondering “who is the mad scientist on Masked Singer?” — it’s Brian Kelley from Florida Georgia Line.

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