Katie and Kieran were pictured holding hands as they left the Jazz Café on Saturday evening (14 February) after watching Alexander perform an intimate concert.
Katie certainly made sure everyone knew it was Valentine's Day, wearing a pink T-shirt with a large heart pattern emblazoned across it, teamed with pink floral trousers.
The mum-of-five had already revealed she and Kieran would be marking Valentine's Day at the Jazz Café, telling ITV's This Morning: "We're going to see Alexander O'Neal perform. I can't wait!"
Katie and Alexander got on well in the CBB house: so well he even said he'd be up for singing at Katie and Kieran's upcoming wedding vow renewal ceremony!
He said previously: "If my schedule allows me to be there then I would certainly feel honoured to. I've got a lot of respect for Katie."
Katie wasn't the only CBB star out to support Alexander.
Feisty Miami-based model Cami Li also turned up, rocking a black leatherette and lace bralet dress from House of CB, £99.
Cami – who held hands with her handsome mystery man outside the venue – later tweeted a photo of herself and Katie pouting for the camera alongside the caption: "Good times last night!"
It was a pretty good weekend all round for the CBB gang as it also emerged that Kavana is engaged! Cami and Katie were among the stars leading congratulations for Kav, who announced he's planning to wed boyfriend Neil Ely.
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