Cameron Diaz says she and Justin Timberlake `know their boundaries` together

Speaking on US morning TV show, Good Morning America, Diaz, 38, said working with Timberlake was: 'A blessing, a privilege that wasn’t lost on either of us. He's so funny and talented,' she gushed.

When asked if the sex scenes were awkward she added: 'It was easier because the boundaries were clear. Like if it's somebody you don't know you are kind of going 'mmm maybe...' but you know, 'no', in this instance we're like 'we already did that',' she giggled.

The actress also admitted that she was nicknamed 'the intestinator' by staff on the set because she was always eating.

'I decided my character was a consumer, she's always taking taking taking so I decided that in every scene I would be eating, drinking or chewing on something,' said the There's Something About Mary star.

'So the whole film I was eating, all the worst foods too - corn dogs and fried chicken it was really just an excuse to eat all the bad foods. Donuts and breakfast sandwiches. The prop guys called me the intestinator,' she laughed.

Wearing a super-short mini skirt Diaz noted that she usually leads a healthy lifestyle to stay slim.

'Because I love to do active things in my lifestyle, if I don't take care of my body, if I'm not strong then I can't bring those things into my life and those are the things that truly make me happy and my happiness is what really makes me who I am.

'So I'm constantly trying to stay strong so that I can do anything I want at any time.'