who was mad scientist masked singer

The Mad Scientist Monster on Season 13 of The Masked Singer was revealed to be Brian Kelley, the Grammy-nominated and diamond-selling country music superstar formerly of the duo Florida Georgia Line. He placed fourth in the competition. Clues in his costume and performances referenced his Florida roots and his hit songs with Florida Georgia Line, such as "Cruise" and "Meant to Be" with Bebe Rexha. Kelley performed songs like "Unwell" by Matchbox Twenty and "Stay" by Sugarland during the show. His identity was confirmed during the season finale aired on May 7, 2025