Rita Ora's backing dancers have made it through to the boot camp stage on 'The X Factor'.

Rita Ora

Rita Ora

The 'Poison' hitmaker is said to have had no idea that twins Polly and Sophie Duniam - who have toured with her and appeared in her 'I Will Never Let You Down' music video - planned to audition for the ITV show.

However, when the wacky duo - known as My Bad Sister - took to the stage, she immediately recognised them, saying: "I know you."

Polly and Sophie, 28, received four yeses after impressing judges Rita, Nick Grimshaw, Simon Cowell and Cheryl Fernandez-Versini with their rap and are now through to the boot camp stage of the competition.

Following their audition, Rita joked: "This means you can't go on tour with me now."

My Bad Sister are not the only contestants Rita recognised, however, as she has also been reunited with an old school friend.

Cory Spedding - who attended the Sylvia Young Theatre school in London with Rita, 24 - has revealed producers put her straight through to the live auditions after discovering the pair knew one another.

But the brunette beauty, who had also planned to audition for 'The Voice', failed to make it any further after Simon claimed the situation was "awkward", the Daily Star newspaper reports.