Showing Reece what he's missing? Tammy Hembrow strips down to a bikini after her ex-fiancé Hawkins' new girlfriend London Goheen took a swipe at the Instagram star

Tammy Hembrow's personal life continues to garner interest following her collapse at Kylie Jenner's 21st in August.

And on Saturday, the fitness entrepreneur showed her ex-fiancé Reece Hawkins what he's missing in a stunning bikini photo shared to Instagram.

Days after Reece's new girlfriend London Goheen took a swipe at Tammy, the single mum showed off her stunning figure in a white bikini while cradling her daughter Saskia, two.

'I want to spend each moment of the day with you,' the fitness influencer captioned the photo.

The social media post comes days after London appeared to make a thinly-veiled jab at Tammy on Instagram.    

London captioned a selfie with Avril Lavigne lyrics: 'Hey, hey, you, you, I don't like your girlfriend.' 

Other lyrics in the song include 'she's like so whatever, you can do so much better' and 'so when's it going to set in? She's so stupid, what the hell were you thinking?' 

One fan wrote 'shots fireddddd' after seeing Avril's lyric in the model's caption, but London responded directly to the user, writing: 'nooo just a song bbbbby.'

The post appeared to a be a direct swipe at Tammy, who shares two children with Reece - Saskia, two, and Wolf, one.

Reece - who split with social media star Tammy in June after four years together - debuted his new girlfriend London last week.

On Tuesday, London also posted an Instagram video that showed her holding hands with Reece while taking a stroll.

Tammy has been taking thinly-veiled digs at Reece all week, including one post that alluded to there being more to their split than has been made public.

'Man if people knew the TRUTH about some people. Biting my tongue so hard it's gonna bleed when I'm done,' read a post shared on Tuesday.

Tammy's cryptic meme may have been in response to Reece's holiday snap with American model London, which was captioned: 'Just keeping it real'.

Another post shared by Tammy last week alluded to being mistreated.

'Break-ups hurt, but losing someone who doesn't respect and appreciate you is actually a gain, not a loss...,' she wrote before deleting it.

This post was seemingly in response to Daily Mail Australia's exclusive story on Friday confirming that Reece and London were in a relationship.

In a YouTube video in June, Tammy clarified that her split with Reece was not due to infidelity.

'One or two months ago, I decided to end things with Reece. He didn't cheat on me, I didn't cheat on him. It wasn't like that at all,' she said.

'I don't want people to think we just gave up. Most people know relationships are very complex.'

The former couple share two children: son Wolf, three, and daughter Saskia, two.