The spider performed ACDC’S “It’s A Long Way To The Top (If You Wanna Rock ‘n’ Roll).”
She describes herself as 'exotic,' but is just like everyone else, adding, "I put my pants on four legs at a time".
The Spider appeared to be in a kitchen, performing Lady Gaga’s “Telephone” and was standing next to framed photos of Jennifer Aniston and the Pope.
Music has always been important to Spider, regardless of what she's up to it's "always in the mix".
Picking up some weights, she also claims she has to work muscles most people don't have to think about, "otherwise they feel flat all day".
"If you can't stand the heat, get out of the kitchen or call a fireman... but don't burn," the spider said.
While the spider told the panel that spiders are “very level-headed,” she once "famously got carried away.”
The judges' guesses were Dami Im, Schapelle Corby, Jessica Mauboy and Shakira.
The monster made their return to the stage last night with Foreigner’s “I Want To Know What Love Is.”
The monster calls herself a “shape-shifter” and mentioned biology – she was frequently shown in a lab and science class environment.
They also stressed the importance of number 31 before adding “Monsters don’t age in human years.”
The monster also said she was "a little bit country, a little bit glam... but never the twain shall meet."
She also told the panel that "In my industry height isn't super important but weight is."
The judges’ guesses were Billie Piper, Ronda Rousey, Shania Twain and Bryan Cranston.
WATCH: Fitzy addresses rumours he's the prawn on Masked Singer
The Rhino had the crowd moving as he performed Flo Rida's "Low,” and admitted that he has “always moved well, showing off some very fancy footwork.”
He called himself an “all-star” and was proud of where he came from, but also admitted that he has been in the spotlight for good and bad (while punching an inflatable swan).
The rhino displayed a championship belt which had the numbers 93, 97, 98 and 00 on it.
"I don't believe in ghosts but I do believe in crossing over," he told the judges.
The judges’ guesses were Conor McGregor, John Hopoate, Barry Hall and Anthony Mundine.
No mere mortal can resist the power of the unicorn, especially when she performs the Tina Turner version of “Proud Mary.”
The unicorn’s first clue was that she has “been the princess but never the queen", while she bathed in rose petals.
“It seemed like my voice was always in the background. The voice has always been important to me,” she said.
The unicorn described her early days as “rocky” and says that “some things are just meant to be.”
“For many years, what I have done has been on my own... but it wasn't always like that,” the unicorn said.
“Unicorns are solitary creatures, although my highlights weren't achieved on my own. Today, I'm an independent Unicorn,” she added.
She also mentioned an old unicorn saying, “Live by the horn, die by the horn.”
The judges’ guesses were Michelle Williams, Mel B, Lucy Lawless and Stevie Nicks.
The dragon is the master of disguise and surprised audiences with a performance of Katy Perry’s “Roar.”
He claimed that the audience was hearing him “like never before” in his mask and that he has “roamed this country for many years.”
He also says he has been in trouble with the law.
Yellow banners with black swans were in the background of his performance, and one of his bodyguards was wearing a t-shirt with a Rottweiler on it..
In addition, the Dragon said he has always loved to sing but it isn’t how he made his living.
“I have had wins on tracks all over the country,” he said.
The judges’ guesses were Daniel Ricciardo, Ben Gillies, Waleed Aly and Mark Skaife.
The Masked Singer Australia airs Mondays and Tuesdays at 7:30 pm on Channel Ten.