With the JLS documentary-film Eyes Wide Open about to be released, the Saturdays singer - who is dating band member Marvin Humes - insisted the girl group hasn't been inspired by them.

"I don't think anyone wants to see us in 3D just yet - it's a bit much! We'll leave it with the guys and their nice, trained torsos," she said at the premiere of Eyes Wide Open in London.

"I have to get in the gym before anyone can see me in 3D," she added.

Rochelle, who has already seen the JLS film, said fans would be satisfied with the end result.

"It's a really good film. I think it's really nice for fans to see their journey and where they are now. I see him everyday so I don't think it's any different, but it's nice for everyone to see," she continued.

JLS member Oritse Williams enjoyed the experience of making a movie, as cameras followed the band behind the scenes on their sold-out gig at London's O2 Arena.

"This is our first movie as a band, and a personal one. We revealed a lot and it means so much. Seeing ourselves in 3D was scary," he said.

Marvin added: "This is a massive journey, and there's footage no one has ever seen before. We want our fans to see a new side to us and find something they never knew before."

Eyes Wide Open will be screened at more than 300 venues across the country between June 3 and June 5.