He kept that quiet.
In the same vein as Cheryl Cole and Tre Holloway, JJ has reportedly struck up a relationship with show backing dancer Rithiely 'Rithy' Periera.
The Sun reports that the two hit it off after the Brazilian dancer was booked to perform on the show.
And the pair have since gone on a string of intimate dinner dates.
A source told the paper: "JJ couldn't keep his eyes off Rithy the first time he spotted her backstage at the X Factor."
"They started chatting and she agreed to go out with him for a date. Now he's really into her."
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The two should also have plenty to talk about seeing as they share a common interest: competing on TV talent shows.
Rithy previously appeared as a contestant on BBC show 'So You Think You Can Dance?'
JJ split from his girlfriend of one year after The X Factor proved to be too much of a strain on the couple's relationship.
Let's just hope this relationship doesn't keep JJ's eye off the ball during the all important final stages of the competition.
Union J found themselves in the bottom two for the third time last weekend alongside eventual eliminated contestant Rylan Clark.
With so much at stake, the boys are going to have to pull out all the stops this coming weekend if they want to make it to Manchester's final in two weeks time.
Perhaps they could enlist the help of some backing dancers?
We're sure Rithy wouldn't mind helping the boys out.