Celeste Barber has revealed that she's come down with a mystery illness. 

In a video shared to Instagram Stories on Monday, the comedian revealed that she had lost her voice. 

'This voice is fine, isn't it? This voice is totally fine,' the 39-year-old croaked in the clip, sounding hoarse. 

She then explained she had to 'shoot eight scenes' tomorrow and didn't appear sure she was up to it. 

Celeste did not reveal what she was ill with but she seems to have contracted an unknown virus. 

It comes after the funnywoman went topless to recreate American influencer Alexis Ren's Easter bunny-themed Instagram post.

The original photo sees Alexis, 25, posing completely naked in a black bunny mask while covering her chest from view with one hand.

Celeste poked fun at Alexis by uploading a side-by-side photo recreating the model's post with the caption: 'Happy Easter. Religion is weird.' 

The funnywoman chose to wear a superhero mask for her post, as well as a pair of flesh-coloured underpants.   

Celeste hasn't always been immune from criticism, having recently faced backlash for mocking Emily Ratajkowski in November. 

Some fans took exception to her caption, which accused Emily of hypocrisy, and said it was an example of 'internalised misogyny'.  

She parodied one of Emily's videos in which the feminist model showed off bottom in a barely there bikini.

She captioned her clip: 'We are sick of you objectifying our bodies! Also, here's my ass.'

The performer was called out for blaming women for their own sexual objectification.