Celeste Barber revealed her fashion fail after arriving in North America on Tuesday for her comedy tour.

The 40-year-old took to her Instagram Stories on Wednesday to show off the very revealing khaki bodysuit that she purchased when jet-lagged.

It comes after the comedian called out fitness influencer Tammy Hembrow, 28, for her 'dangerous' Instagram post where she showed off her flat stomach just 12 days after giving birth.

In her Instagram Story post, Celeste showed off a very tired expression as she went braless and posed for a mirror selfie in her hotel suite in the very revealing bodysuit.

She wore the khaki one-piece over the top of black underwear and hilariously captioned the post, 'Note to self - don't go shopping when jet-lagged'.

Days prior on Monday, Celeste urged her female followers to be 'kind to themselves' as she called out fitness mogul Tammy for showing off her slim post-baby body.  

While she commended Tammy on her 'success', Celeste said women should never 'feel a need' to show off their bodies in activewear. 

'No disrespect, well done on your success but this is dangerous,' Celeste wrote alongside footage of Tammy posing inside her bedroom in a skintight crop top and leggings.

'Women should NEVER feel as though they need to put on activewear and show off their bodies, to prove a point ESPECIALLY 12 days after having a baby. 12 DAYS!'

Celeste, who shares two young sons with her husband Api Robin, then shared her own experience just days after giving birth.

'Jeez I was sh***ing in a bag and screaming into a pillow after having my babies. How we look is irrelevant. Be kind to yourselves, moisturise your nipples and unfollow accounts that make you feel like sh*t!' she said.

In her Instagram post on June 30, Tammy revealed her slim and toned body at just 12 days postpartum.   

She said she 'stayed as active as possible' before and during her pregnancy by following her programs on her own fitness app.

'I honestly feel like my core was at its best in my whole life just before I fell pregnant with [daughter] Posy so I'm excited to see what I can do this time round after baby number 3!'

Tammy, who said she's ready to get back into a fitness regimen at six weeks postpartum, did stress that everyone's journey is different.

'Please DO NOT be hard on yourself or compare yourself to others. We all have different genes, different lifestyles, different circumstances etc,' she wrote.

'That being said I work and have worked extremely hard and want nothing more than to motivate and inspire you!'  

Tammy welcomed daughter Posy with her Ironman fiancé Matt Poole. 

She's also a proud parent to son Wolf, six, and daughter Saskia, five, with her ex-fiancé Reece Hawkins.