In a column for The Mirror, the journo had said: "Completely baffling madness. She's even less musically revered than Cheryl (which takes some doing), dull, desperate and literally The Voice's sloppy seconds."
Well, Rita wasn't impressed….
Firing back via a now-deleted tweet, she reportedly rather bluntly told the journalist: "Suck my d**k.
A tweet still visible adds: "But never guess what, see you every Saturday night. I know you'll be watching."
Rita than affirmed her excitement at joining the X Factor judging panel alongside Nick Grimshaw, Cheryl Fernandez-Versini and Simon Cowell.
She tweeted: "Tonight Matthew I'm going to be...an X factor Judge! I can't wait! So excited to find the new UK talent! Alongside grimmy Cheryl and Simon!"
X Factor's most shocking moments: