The 'R.I.P.' singer, who will join Gary Barlow, Tulisa Contostavlos and Louis Walsh at today's (May 28) try-outs in the capital, tweeted that she too is still trying to make a name for herself in the music industry.
"IM HERE...... I CANT BREATHE!" she wrote. "X-FACTOR..... IM JUST LIKE YOU REMEMBER THAT. IVE JUST STARTED TOO IM HERE TO HELP (sic)."
Ora has taken over from previous guest judges Geri Halliwell and Leona Lewis, who saw hopefuls in Liverpool and weekend auditions in London respectively.
The 'Hot Right Now' singer has been tipped to join The X Factor on a permanent basis, with a source saying the job is "hers to lose".
Guest panellists have been drafted in after Kelly Rowland quit The X Factor and Dannii Minogue reportedly rejected a £1m offer to return.