Cameron Diaz

Cameron Diaz. Photo: Getty Images

Cameron Diaz says everyone will experience infidelity in their lifetime.

In Diaz's latest movie, The Other Woman, she plays a woman who finds out her boyfriend has a wife, and another girlfriend.

The 41-year-old actor says it's unfortunate but infidelity is something that happens to everyone.

“Everybody has been cheated on, everyone will be cheated on,” she told in an interview with OK! magazine.

“I can't fix that, I don't know how, I don't have any judgment on anybody, I don't know how to fix the problem.”

Diaz has dated a number of high-profile celebrities, including Jared Leto, Justin Timberlake and pro surfer Kelly Slater. She's also rumoured to have dated a host more, including the likes of Jude Law, Robbie Williams and Gerard Butler so it's fairly safe to assume she is speaking from experience.

“We are all human beings, we are complicated,” says Diaz. “You cannot go through life without tallying up a few scars, you cannot go through life unscathed, it's just what it is. It's all meant to happen; take your lessons, figure it out, move on.”

Diaz says it's her friends that really make a difference when she's going through rough relationship patches.

“I exist for all my girlfriends. I am very, very, very fortunate,” says the actor. “My friends are incredible and I am very lucky to have a lot of really solid, good friends – girlfriends and male friends – who I can just rely on.”

Infidelity is not Diaz's only bugbear. The Charlie's Angels star recently published a health and fitness book, and says “anti-ageing” is a myth.

Diaz told Oprah Winfrey in an interview she hates the way advertising makes women feel bad for ageing.

“I get so mad when I hear commercials on television where [they say] 'anti-ageing,'” she said in the interview for Oprah Prime, via the LA Times.

“Like we're supposed to now apologise for being who you are where you are and what it took you to get here,” Winfrey said, in response.

Diaz says that's the crux of the problem.

“We don't honour the journey and who we are and how much we have to offer,” Diaz added. "It's almost as if we have failed if we don't remain 25 for the rest of our lives.”

In a book extract, published by Marie Claire, Diaz says that ageing is both “a blessing and a privilege”.

“If you lay the foundation for a healthy life in your younger years, your older years may very well be some of the best of your life,” writes Diaz.

The Charlie's Angels star has always maintained that she has never undergone plastic surgery, and has only had one misadventure with Botox.

“I've tried [Botox] before, where it was like [a] little tiny touch of something,” she told Entertainment Tonight.

“It changed my face in such a weird way that I was like, 'No, I don't want to [be] like [that]' … I'd rather see my face aging than a face that doesn't belong to me at all.”

Clearly more than happy to embrace the natural ageing process, the stunning actor said that she doesn't mind having laugh lines.

“I love it, I don't mind,” Diaz said. “It's like, 'Guess what this means, I've smiled my whole life.' I love life. I'm happy I don't have a problem with that.”