Cameron Diaz on husband Benji: 'This is what real love is'.

Cameron Diaz and Benji Madden are about as loved-up as it’s possible to get.

So loved up that Cameron has erased her entire romantic history (even Justin Timberlake? But he’s Justin Timberlake?!).

“Nothing matters now that I have my husband,” the 43-year-old actress told Andy Cohen on Sirius XM Radio. “I don’t even remember any of that. Like that’s the thing, that’s how I know he’s my husband because no one compares.”

She say she and Madden crossed paths a few times before their relationship really kicked off, but Diaz knew right away the 37-year-old rocker was someone she could connect with.

"The first thing I saw when I first met my husband, I was like he's hot!" she said. "We had just never been in the same circle, then I saw him like a year later, I saw him again, and I was like wait a second, still hot."

The pair were introduced by Benji's twin brother Joel and his wife Nicole Richie at a barbeque at Cameron's house.

"Joel said 'Hey, can my brother come over?' And I said, 'Of course, it's family, we're having a barbecue' and then he walked in the door and I was like … you! You!"

The pair hit it off and soon became one of Hollywood's most recognisable couples.

Despite the fact Diaz had said on multiple occasions she would never get married, the couple wed in an intimate ceremony in January 2015 in their living room. It doesn't get more effortless-rocker-cool than that.

Diaz told Cohen that before Benji she never believed people who said 'when you know, you know'. But after meeting him, everything changed. "I was always like, 'What does that mean … what does that mean?' Then I was like 'Oh, I get it, you just know when you know, like you're my husband."

It's been more than a year, but Diaz is still firmly locked inside her newlywed love-bubble.

"Everything else just kind of like washes and slips away," she said. "You realize like, 'Oh right, this is what the real thing is, this is what real love is and this is what commitment and devotion is."

"This is the person that you build your life with, and for me, it's like the rest of everything else just kind of like dissolves."

Cameron has realised that sometimes you really do just "know". When did you realise your partner was the one?