The Masked Singer Australia latest unmaking was an shocking one, with judges left gobsmacked over the reveal.

Check out all of the reveals and our guesses on who's behind the remaining costumes:

Shaynna Blaze

The Block judge and interior design queen Shaynna Blaze was revealed as Bluebottle on The Masked Singer.

Despite a rousing rendition of Blondie’s Call Me and stellar effort against Tiny, she was selected by the panel to have her identity uncovered.

None of the judging panel guessed correctly, locking in Emma Bunton, Florence Welch, Gladys Knight and Natalie Bassingthwaighte.

Following her unmasking, Shaynna and Chrissie admitted that they had been texting about whether she was under one of the masks.

“I texted you and you said you couldn’t get here even if you wanted to!” Chrissie said.

“I was busy!”, Shaynna replied, before revealing that she had in fact been flying around the country throughout the experience in order to tick off her many commitments.

“[Singing] was something I squashed for a long time, but now it’s time to bring the vocal chords back out again I think.”

Summer Warne

Late cricket star Shane Warne's daughter, Summer Warne, has been unmasked as Bad Avocado on The Masked Singer after an emotional rendition of Coldplay’s Yellow.

The guessing panel threw out a number of guesses ranging from Michelle Payne to Jacqui Lambie and Alyssa Healy to Pettifleur Berenger.

Speaking about her decision to go on the show, Summer said: “My Dad loved me singing, and my whole life I’ve wanted to do that kind of thing. He was like, ‘You’ve got to do it, Summer, you’ve got to do it’. I was like, ‘No, it’s not for me’. I was too scared. [But ahead of The Masked Singer Australia], I had his little voice in my head going ‘Just do it – stuff what anyone thinks, just do it’.

“I want to make Dad proud. Singing Yellow was absolutely amazing - that song was his funeral song. Chris Martin sang it at the state memorial.”

Sandra Sully

10 News First presenter Sandra Sully was unmasked as Fawn in a shocking reveal. Despite impressing with her take on The Pussycat Dolls' Don’t Cha, she wasn’t able to top Tiny’s rendition of Katrina and the Waves’ Walking on Sunshine.

None of the guessing panel, Mel B, Dave Hughes, Chrissie Swan and Abbie Chatfield, guessed right, instead going for Carrie Bickmore, Pip Edwards, Chloe Hayden and Jackie O.

Following her unmasking, Sandra said: “I read the news every night and tragedy happens all the time, really heavy stuff, but you do only live once. Life is short - don’t live a life of regret.”

She then confessed to Dave Hughes that she had actually been rehearsing for her time on the show in his neighbour’s apartment.

“[I was] hoping like heck that I wasn’t going to run into you, or that you would hear me!”

Brian Austin Green

Former Beverly Hills, 90210 star and Hollywood heartthrob Brian Austin Green was revealed as Crash Test Dummy in the season premiere of the show.

Despite a heartfelt rendition of Shawn Mendes’ Stitches, he failed to beat Bad Avocado’s take on NEIKED, Mae Muller and Polo G’s Better Days and was eliminated from the competition.

None of the judges - Mel B, Dave Hughes, Chrissie Swan and Abbie Chatfield - guessed Brian Austin Green as Crash Test Dummy, and instead nominated Nick Carter, Niall Horan, John Steffensen and Donnie Wahlberg as his possible identity.

“You guys aren’t cut out for this job!” Brian joked after he was unmasked.

“I’m turning 50 this year, I’ve had 50 years so far of an incredible life. I took a lot for granted though. I had a neurological issue come up in my life. I couldn’t speak, I couldn’t say more than one word every 30 seconds. So, I’m at a place in my life where I’m just trying to say yes to everything and experience things. I really feel like this is the second part of my life.”

Bouncer

This familiar voice sounds like Aussie music star Conrad Sewell. If it is Conrad, let's just say he didn't quite hide his incredible vocal talent from fans. "Think it's pretty obvious it's Conrad Sewell as I definitely recognise that voice underneath the Kangaroo mask," someone wrote on Instagram.

People are convinced it's the Healing Hands singer, writing, "That's got to be Conrad Sewell and I'm excited" and "That's Conrad Sewell! I can't believe we're all guessing before the premiere."

"Worst kept secret ever," someone else commented.

Cowgirl

This Cowgirl sure knows what she's doing on stage, and to fans, it's pretty obvious who's behind the mask. The top guess is none other than Australian drag queen and singer, Courtney Act.

Fans have made their guesses clear on Instagram, with comments including, "That's Courtney Act!! Love love love!!!" and "The voice is a dead giveaway".

Someone else was very clear about wanting Cowgirl to take home the trophy, writing, "It's Courtney Act and I want her to win."

Snow Fox

We're wondering if Snow Fox thinks you wish your girlfriend was hot like her... with a voice that sounds like Pussycat Dolls singer Nicole Scherzinger. After all, she is a judge on the US version of the show.

Many fans say Snow Fox sounds familiar, but can't quite put their finger on who it is. Popular guesses also include Amber Riley, Jessica Mauboy and Rita Ora, although it's unlikely to be the latter two as they're currently judges on The Voice for rival network Channel 7.

Grim Reaper

We're feeling this singer is truly, madly, deeply an Aussie icon. Fans are ecstatic at the thought Grim Reaper is Savage Garden frontman, Darren Hayes. That voice is something we've definitely heard before.

Fans think they've cracked the code and have taken to the comments writing, "Obviously Darren Hayes" and "This is Darren Hayes 100%".

Another contender is Human Nature's Michael Tierney, but we're REALLY hoping for Darren.

Space Fairy

The comments flooded in for this one, with many guessing it's Australian singer Jade MacRae, known for her 2005 hits, 'Super Star' and 'So Hot Right Now'.

One fan is certain it's the Aussie music star, writing, "100% Jade McRae".

Other guesses include Tones & I and someone even threw Kylie Minogue into the conversation.

In the latest promos for the show, Mel B says that Fawn is Aussie radio presenter and former Masked Singer judge Jackie O. Mel is also very confident that Bluebottle is her Spice Girls bandmate Emma Bunton. We're thinking these celebs are a little too obvious though, so we'll wait a bit longer to lock in our guesses.

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