The X Factor’s Katie Waissel has teased she could be a judge on the show.

Katie Waissel
(Yui Mok/PA Wire)

The 28-year-old singer, who appeared on the seventh series of the ITV singing contest, sparked speculation she could join the panel after performing on The X Factor final alongside former contestants with a tweet as she prepared to fly to Los Angeles.

Katie, the lead singer of rock band Red Velvet, performed a I’ve Had The Time Of My Life medley with fellow singers Wagner, Chico, Stevi Ritchie and Chloe-Jasmine Whichello.

At the end of their rendition, she was seen mouthing “you owe me” to Simon Cowell.

She explained in her New! column: “I had no idea the cameras were on me when I had my little moment with Simon. I see viewers are fantastic lip readers and yes I did say, ‘You owe me one.’

“Simon and I are as close as pennies in a purse, and yes there are very exciting things to look forward to for next year, so watch this space…”

Katie Waissel
(Jon Furniss/Invision/AP)

Katie also teased that she is keen to bring back some rock and roll, following Ronnie Wood’s performance with One Direction at the final.

“This is what I want to bring to The X Factor next year! Bring back the Rock n Roll!” she wrote.

She also posted a note on Instagram, showing her appreciation for the show.

Simon, Cheryl Fernandez-Versini and Louis Walsh returned to their judges’ chairs for this series, joined by Mel B.