Everyone's got a theory about who they think Queen Bee or Hedgehog is, haven't they?
From the wild, outlandish maybes to the B-list celebs who are probably more likely to appear, fans think they've got the Masked Singers pegged.
The show is completely bonkers, but totally addictive, and it gets everyone guessing at their screens - even if they claim they're not watching it really and it's "just on in the background".
Here are some of the most popular guesses fans have made on social media.
What do you think, are the fans right? Tell us your guesses in the comments.
Queen Bee
Queen Bee is sparking loads of conversation on social media.
Fans have been convinced it's Charlotte Church , and then Nicola Roberts .
Here are the most popular guesses:
- Charlotte Church
- Nicola Roberts
- Courtney Act
- Kelly Osbourne
Duck
- Dame Kelly Holmes
- Denise Lewis
- Nicola Adams
- Mo Farah
- Greg Rutherford
- Coleen Nolan
- Skin
- Fatima Whitbread
- Mel C (or any of the Spice Girls).
Here's what to expect from the Masked Singer:
Unicorn
Fans are convinced the Unicorn is actually John Barrowman.
These are the other main guesses:
- Courtney Act
- Mika
- Louie Spence
Hedgehog
There are LOTS of theatre names being thrown around for Hedgehog - with Michael Ball being a big favourite.
Here are the other guesses:
- Michael McIntyre
- Jason Manford
- Shane Richie
- Alexander Armstrong
- Jack Whitehall
- Lee Mead
Monster
- CeeLo Green
- Chris Eubank
- James Cordon
Fox
- Gillian Taylforth
- Denise Van Outen
- Rita Simons
Daisy
- Kelis
- Ayda Field
- Katherine Ryan
- Annie Lennox
Octopus
- Jodie Marsh
- Kimberley Wyat
- Ashley Roberts
Tree
Peter Crouch seems to be a big favourite for the Tree. But can he sing?
The other guesses include:
- Rio Ferdinand
- David Beckham
