'The X Factor' Judge Paulina Rubio Turns Up Late To Denver Auditions, Blames Lost Luggage & Airline

She's known for her temper and Paulina Rubio didn't disappoint fans at auditions for The X Factor in Denver, Colo., on Sunday, RadarOnline.com has been told.

The 42-year-old Latin diva could not help but express her frustration at American Airlines, who lost her suitcases and made her late for filming!

"I would have been on time if it was not for f**king American Airlines who lost my bags," a furious Paulino told the live XF audience on Sunday afternoon.

She had reason to be upset, too: The fashionable judge had to scramble to find a new outfit for the auditions and admitted to her fellow judges that she had to borrow her mom's dress!

And almost more surprising than the production delay was, for the first time, Simon Cowell arriving at the auditions before all the other judges­ an hour early.

The perennially late X Factor boss has been "tardy to most of the auditions and Paulina, Demi and Kelly have been giving him grief for always be late," an X Factor insider told Radar.

"But this time the tables were turned when he was the first judge to arrive!"

The filming also marked Demi Lovato's return to the judges' table after the death of her father, Patrick, on June 24.