But who is under the mask?
As well as listing the odds for who might take out the crown in the upcoming finale, Sportstbet have also offered up their odds on who might be beneath the remaining masks.
Our predicted winner, Mirrorball, is widely thought to be Melody Thornton, who has odds sitting at $1.25. A former member of The Pussycat Dolls, Melody's voice matches well to the high-pitched and melodious voice of Mirrorball.
However, she's not the only guess - she's followed on the Sportsbet ladder by Samantha Jade, Chloe Lattanzi, and Dannii Minogue, who are paying $8.50, $10, and $13 respectively.
Odds are also in place for the other two remaining masks: Rooster and Snapdragon.
Snapdragon is widely believed to be Sheldon Riley, who has odds at $1.12.
He's also speculated to possibly be Australia's famous drag queen, Courtney Act, or Australian Idol alumnus Anthony Callea.
Meanwhile, the best guess for Rooster seems to be Hugh Sheridan, paying $1.20.
Strangely, Hugh is followed on the list by Paul Kelly, with odds at $8.50. While these two performers are wildly different, it just goes to show how surprising the reveals on the show can be.
Sportsbet is usually a pretty reliable source when it comes to guessing these things, with a track record of accurately predicting the winner of shows like The Bachelor, Survivor and I’m A Celebrity.
And we have no reason to think The Masked Singer will be any different!