She's the self-confessed 'living doll' who managed to wow tough-to-please Simon Cowell and the rest of the X Factor judges over the weekend. 

However, it has now emerged that, far from being an undiscovered talent, Sada Vidoo has a hugely successful career in Denmark.

Already an well-established singer/songwriter, she has been signed to a record label in Denmark – although Mr Cowell, Nicole Scherzinger, Sharon Osbourne and Louis Walsh said that they have never heard of her before she arrived for her X Factor audition. 

Sada has released an album and several singles, going platinum in her native country: she penning the song Infernal for dance act Ten Miles in 2007 and the song ultimately went on to be a HUGE hit.

It even topped charts in Turkey, Spain, and Poland

Her own album A Story With No End was released in 2014.

Over the weekend, she performed Love Is A Battlefield for the quartet of reality TV show judges, with Simon saying she was "barking mad".

A spokesperson for the ITV show said in response: "Anyone can apply for The X Factor whether they are professional or amateur, irrespective of their past experience and all contestants are auditioned on merit.

"Past experience can not always be featured in the programme due to time constraints."