Straight from the horse's mouth!  Pete Evans' wife Nicola Robinson posts BIZARRE photo of her horse Olly singing 'a jolly good ol song' to her

She's the glamour model turned paleo supporter who eschews store-bought toothpaste and sunscreen.

But Pete Evans' wife Nicola Robinson may soon be able to add the title horse whisperer to her long list of advocacy, after posting a photo of her her horse Olly 'singing' to her.

The 39-year-old shared the photo to Instagram on Monday, showing her horse's mouth agape in apparent song. 

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'Olly is standing tall & proudly serenading us all with a jolly good ol song!' On Monday Pete Evans' wife Nicola Robinson posted a photo to Instagram of her horse Olly, right, singing to her 

'Olly is standing tall & proudly serenading us all with a jolly good ol song!' On Monday Pete Evans' wife Nicola Robinson posted a photo to Instagram of her horse Olly, right, singing to her 

The picture shows the former Playboy ambassador sitting in a wooded area with two horses.

Her long brunette locks partially cover her face as she looks contemplatively at the camera.

Olly, the horse on the right, has his mouth open exposing his teeth as he is 'serenading' Nicola and his other equine companion. 

'He's feeling ever so hopeful for the water protectors': The post was written in support of those protesting the construction of the Dakota Access Pipeline

'He's feeling ever so hopeful for the water protectors': The post was written in support of those protesting the construction of the Dakota Access Pipeline

Horse lover: The former glamour model frequently posts photos of her horses to Instagram 

Horse lover: The former glamour model frequently posts photos of her horses to Instagram 

'Baby Z, Shikoba & I are happily sitting beneath the trees & as you can see, Olly is standing tall & proudly serenading us all with a jolly good ol song!' Pete Evans' wife captions the photo.

'He's feeling ever so hopeful for the water protectors & allies & he's deeply grateful for the almighty power of combined, pure, conscious intent!'

The 39-year-old also adds the hash-tags 'no dapl' and 'unity' - an apparent reference to ongoing protests in the United States against the construction of the Dakota Access Pipeline.

Monday's Instagram photo joins a string of regular postings which advocate her earthy lifestyle.

Loves them too: Nicola's husband Pete also shares an affinity to horses 

Loves them too: Nicola's husband Pete also shares an affinity to horses 

Happy couple: Pete and Nicola married earlier this year and enjoy an organic, paleo lifestyle together

Happy couple: Pete and Nicola married earlier this year and enjoy an organic, paleo lifestyle together

In July, Nicola told her followers to Google recipes for homemade 'remineralisation' toothpastes.

 Last month, she encouraged Instagram fans to detoxify their 'earth suits' by not using supermarket body and home cleaning products.

Nicola wrote: 'Once upon a time, thankfully long ago, I naively used the nastiest stuff, you know the brands - they're the predominant cleaning products that line most supermarket shelves & they're filled to the brim with poison!' 

She's changed! Nicola, 39, had three breast augmentations when she worked as a New Zealand glamour model named Nicky Watson in the late nineties and early noughties 

She's changed! Nicola, 39, had three breast augmentations when she worked as a New Zealand glamour model named Nicky Watson in the late nineties and early noughties 

Her husband Peter, who she married in April, has long courted controversy for his unconventional diet and health advice.

The celebrity chef has advised fans not to use sunscreen and included a bone broth recipe for infants in one of his cookbooks. 

In a recent interview with Good Weekend, the My Kitchen Rules judge revealed Nicola now 'deeply regrets' her famous implants, and is 'looking forward to having them removed in the near future'.  

'Detoxification of our Earth-Suits':  Nicola recently took to Instagram to claim that many traditional supermarket products should be avoided- including sunscreen

'Detoxification of our Earth-Suits': Nicola recently took to Instagram to claim that many traditional supermarket products should be avoided- including sunscreen