There's one celebrity international judge Lindsay Lohan should recognise should he be one of the masked singers – Jackie O's KIIS FM radio co-host Kyle Sandilands, who has interviewed the American actress in the past.
"I knew if he was going to be asked to be one, he wouldn't tell me, so I did sort of think he could definitely be one of the masked singers," Jackie, 44, tells TV WEEK, adding she thinks Kyle could take it all the way.
"He's a good singer," she says. "This is why I was thinking he'd be a good pick for it, because he can sing. And, you know, some of those costumes, they disguise a lot."
Jackie and Lindsay have grown close – despite Lindsay once hanging up on Jackie in an interview.
"I know there's been the hang-up in the past, but it's nothing," Jackie declares, brushing off the "feud".
"I mean, I don't take any offence to things like that – in this job, you take the good with the bad.
"Actually, she was relieved I was going to be on the panel, because for her, she's really kind of jumping into the fire – she doesn't know any Australian celebrities."
So far, fans have seen two celebrity singers unmasked, with Gretel Killeen and Brett Lee becoming the first two contestants to be eliminated.
Should Kyle be in the series, Gretel reveals no one on set would have known.
"From the moment you're picked up you're completely hidden and you don't talk to people," Gretel tells TV WEEK.
"Even when we were all singing together, rehearsing, we were completely covered up. So even though someone might be half a metre away from you, you don't know who they are."
We wonder who else will be unmasked on Monday night? See all the clues so far here.
The Masked Singer airs Monday and Tuesday, 7.30pm, on 10.