Cheeky girl! Imogen Anthony flaunts pert derriere as she holidays in Hamilton Island on her birthday after sparking engagement rumours

She's the girlfriend of shock jock Kyle Sandilands.

And on Friday, Imogen Anthony celebrated her birthday in style as she shared a picture and video on Instagram of herself in Hamilton Island. 

The 26-year-old was pictured flaunting her pert derriere in a tiny bikini as she leaned on a golf cart beside her busty friend Krystal Dawson. 

And In the uploaded video, Imogen is seen blissfully swaying her head back and forth as she danced around in her bikini. 

Closing her eyes and smiling, the blonde looked to be in cheery spirits on her special day. 

And perhaps it's not the only thing she's celebrating, last week she sparked speculation that Kyle had finally got down on bended knee after flaunting a huge diamond ring on Instagram last week. 

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 In a short close-up video, Imogen showed off the aquamarine and diamond dazzler, which was custom made by her favourite jeweler, House Of K'Dor.

However, the glamour model was quick to dispel any potential rumours of wedding bells in the videos caption.

The busty blonde: 'This is the replacement from my last ring I tragically lost/had stolen (someone out there has it, I know they do, a-hole).

'But I'm already more attached to this one anyway. Blue is a bit more me, I think Kyle said it matches my 'baby blue' eyes #smooth lol,' she said about her 45-year-old beau. 

'Thank you @zenakdor & @tarickkdor for my custom diamond honeycomb basket design. It's very, very special to me...' the socialite added. 

Even though she was clear in her post that it was not an engagement ring, the video still caused intrigue among her legions of followers, who speculated it was her engagement ring.

One wrote: 'Wow go big or go home that's amazing.'

Another said: 'If this isn't your engagement ring holy moly imagine how gorgeous that is going to be.'  

Someone else commented: 'Omg I could stare at that all day!'

The couple have been subject engagement rumours in the past, and in August she spoke to Daily Mail Australia about the constant speculation.

'There's always rumours, there's rumours we've been engaged for three years, no we just chill, we don't need rings and stuff. 

Meanwhile in a recent interview with The Daily Telegraph, Kyle said he was under a lot of pressure as a man to find the right ring and come up with the perfect proposal.

'I can’t just hang it on a strawberry with a little bit of fishing wire, I’ve got to do something impressive.'