It's almost like a toothpaste commercial!
Katie and her husband were pictured beaming while leaving the Hammersmith Apollo on Wednesday evening (18 February), with Katie's kids Junior and Princess pictured looking just as happy in the backseat.
The family clearly enjoyed their evening, with Katie tweeting during the show: "Me, Kieran, Junior and Princess are loving Sam Bailey's concert. So amazing, flawless and sings all the classics #blownaway."
Last night was the final performance on Sam's tour. She won the tenth series of X Factor under the guidance of Sharon Osbourne in 2013.
It emerged this week that Sam has been dropped by Simon Cowell's record label Syco, but the former prison guard has said she is looking at the positives.
"People almost think someone has died. It's nothing to be sad about. I'm honestly grateful for Syco and the time I was with them. If you win a competition to win £10,000, eventually that £10,000 won't be there anymore.
"I kind of knew it was coming. You have to look at it statistically and how the show has been before and the people who have been on it. I'm not silly, I've been around the block a bit. I kind of knew it was coming.
"To be honest, if Syco said they wanted to renew the contract I'd question what they wanted to do with me. I don't want to do another covers album, I want to be recognised as an artist that is going to write some songs."
Meanwhile, for Katie and Kieran, it was their second night out this week following a Valentine's Day trip to watch Katie's CBB housemate Alexander O'Neal perform at the Jazz Café.
Katie and US R&B singer Alexander struck up a good friendship inside the house. So good, in fact, that Alex has said he's open to singing at Katie and Kieran's wedding vow renewal ceremony!
It's thought they will reaffirm their vows this weekend.
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