So just imagine how difficult Kelly found it to film a segment in her latest movie Piranha 3D in which she had to kiss a female porn star while underwater. Must’ve been a real stretch of her acting abilities indeed.

While at Com-Con in San Diego yesterday Kelly opened up about how tricky she found it to kiss her co-star Riley Steele (seen above arsing around with Kelly in these pictures while wearing some 3D glasses) while swimming, saying:

"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.” Kelly also added that she and Riley had to have "a lot of practice" making the movie.

We’re sure you did girls, and well done you for providing some mild titillation on a Sunday. Now moving swiftly on…