Portman blasted over Black Swan

NATALIE PORTMAN's Black Swan body double has claimed the actress performed 

'less than five percent' of the intricate ballet moves in the Oscar winning film.

Professional ballerina SARAH LANE has spoken out as she thinks she is the victim of a cover up by studio execs. She says CGI was used to digitally impose Natalie's head on footage of herself performing the complicated dance sequences in the film.

Sarah, who is part of the prestigious American Ballet Theatre, said: "They wanted to create this idea in people's minds that Natalie was some kind of prodigy or so gifted in dance and really worked so hard to make herself a ballerina in a year and a half for the movie.

Ballet ... Natalie in Black Swan

"Of the full body shots, I would say 5 percent are Natalie." Black Swan tells the story of a young ballerina who endures vivid and haunting hallucinations as she pushes herself to her professional limits.

Natalie, who picked up Best Actress gong at this year's Oscars for her performance, and co-star MILA KUNIS, underwent months of gruelling dance training to prepare for the film, which was met with global critical acclaim.