Susan Boyle has reportedly caused havoc during the filming of a show telling the story of her rise to fame – by dancing while singing a ballad.

The Britain’s Got Talent star was asked by producers to perform I Was Born to Be a second time after deciding to dance a jig half way through the song.

However she showed off her dancing talents again during the second attempt for I Dreamed A Dream: The Susan Boyle Story.

A show insider told The Mirror: “It was odd and very out of character with the song and with the show.

“Susan just looked like she was doing it as a break from the seriousness and the pressure of having to sing throughout a show.

“It’s going to give us a bit of a headache – we will have to edit around it.”

SuBo also got a chance to perform with her hero Elaine Paige, singing I Know Him So Well with her.

Susan told the paper: “I never thought I’d see myself on the same stage with such an icon from West End theatre. I don’t want the dream to end – in fact, I want it to become a reality.”

Elaine said: “It was a pleasure to sing with Susan – she was a delight to work with.”

I Dreamed A Dream: The Susan Boyle Story will screen on ITV1 on Sunday at 9.30pm.