Ten years after they split, the girl group are back for a UK reunion tour.
She revealed on Instagram that her cousin John Boy died last week, in a hit-and-run incident in Florida.
As well as herself and Nicole Scherzinger, Kristina wants to see US star Mandy Moore on the panel.
Exclusive: "You don’t want to take it personal, but you do feel a little deflated."
His future on the show - along with Sharon and Nicole's - was said to be in doubt.
But is it too late to save 'The X Factor'?
They've urged her to 'stay away from shoddy facilities'.