Talking exclusively to omg! at the London premiere of Breaking Dawn Part Two, Union J couldn't help but find the Hollywood star's vampire persona a turn on.
A doe eyed Jamie simply told us: "She's beautiful," leaving Josh to explain why.
He explained: "She's even more sexy now she's a vampire. There's something about vampires we all have a little thing for.
The boys can't help but fancy Kristen even more now she's turned to the vampire side Copyright [PA]
"Especially now that she's a vampire she's got it!"
George Shelley meanwhile seemed to have a thing for the Kristen Stewart because of her newly acquired contact lenses.
He said: "It's those red eyes!"
Each to their own we guess.
On last weekend's X Factor results show, Union J ended up in the bottom two alongside fellow boy band District3.
Union J have vowed to work harder this week Copyright: [rex]
After surviving the sing off, JJ promised that this week the boys will come back fighting to avoid facing the chop this weekend.
He said: "We want to be comfortable on stage, we had a bad weekend on Sunday but we want to show that we are professional and that we can come back fighting for it.
"This is what we want so we are going to come back fighting on Saturday."
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We don't doubt that.
As for the boy's new found attention from female fans, Jamie admitted that it still takes a bit of getting used to, not that he's complaining.
He said: "It's a good feeling it's one of the perks of the job but we're still not used to it to be honest, we're still not used to any of this, this is all such a blur to us. It's crazy."
The X Factor returns tomorrow night on ITV1.