from www.thesun.co.uk- Stunning Kelly Brook has revealed her most difficult movie scene ever…

And it’s MAKING LOVE to a gorgeous female porn star underwater while completely starkers!

Kelly and porn star Riley Steele strip off for a sizzling scene in forthcoming horror epic Piranha 3D.

Last night, Kelly revealed:” It was really difficult.

“Holding your breath while making out with someone as hot as Riley Steele.

“I had to learn to hold my breath for a very long time.”

The busty brunette claimed they had to “have a lot of practice” before filming the no-holds barred lesbo romp.

Kelly who battles flesh-eating prehistoric fish in the movie and Riley became firm friends while shooting the film.

And Riley admitted:” It’s not work when you get to kiss Kelly Brook. She’s so hot.

“Doing it underwater did make it a bit more difficult but I’m not complaining.”

Cinema goers will see the sexplicit scene in glorious 3D when the film is released next month.

Kelly giggled when fans were given a special and tantalising short preview of the raunchy romp in San Diego.

But she promised:” It’s a lot longer in the film. It goes on for quite a long time.”