documented his girlfriend swimming naked in a river as he posted a cheeky birthday tribute online. The host, 65, filmed model Lisa Hogan, 49, in the midst of a front crawl as she marked her special day in the sunshine.
Her blonde hair was partially submerged in the water as she swam in her birthday suit down the stretch of water. Sharing the short snap on his Instagram grid, he captioned the post: "Birthday girl in her birthday suit." It didn't take long before fans flooded to the comments to pass on their birthday wishes to the star online.

One user penned: "Happy Birthday Lisa" as another gushed: "Ohhhh Lisa is a Gemini the best star sign, Happy Birthday." A third then urged the star: "Get the F in there JC, good for your health and we need you well, forever."
The motor journalist's birthday message came after the former model called out the presenter in a cheeky birthday post of his own back in April.
She was quick to poke fun at the TV star after he officially became an OAP as she shared a loved-up snap of them together. Insisting she was proud of her partner, Lisa wrote a lighthearted post to mark his birthday milestone.
Lisa added: "Congratulations for Finally achieving those Three Little Letters! After five-and-a-half decades of service to King & country, and indeed across this fine globe, I'm so proud, & frankly astonished, you've earned Jeremy Clarkson OAP. Happy Birthday @keremyclarkson1."
The happy couple have been together for seven years. In June last year, the Irish belle opened up to RTÉ Radio about how she initially started her romance with Jeremy.
Lisa said they "met through mutual friends who had tried to set us up a couple of times". The turning point came at a Christmas party, as she explained: "I was just about to leave and we were introduced and he said, 'No, no, no, come on, sit down and have a chat'. And that was it, really.
"So, he called me a couple of days later and I thought, 'Ok, you've got a bit of a rep' - so he had to court me! He courted me for a solid three months!"
She added: "He's very, very good company. And he does make an effort to make me laugh a lot, which I really appreciate. And we do get on."
Before she met Jeremy, Lisa was married to Baron Steven Bentick for 30 years before they split in 2011, and share three children with him -Wolde, Alice, and Lizzy.
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