The actress wishes she could pull off the Bajan babe's daring outfits and loves her "incredible" confidence.
She told French Grazia magazine: "My style icon is Rihanna, she's incredible. She transcends everything she wears."
Rihanna's sartorial choices haven't always been well received, namely the see-through custom-made Adam Selman dress she wore to the CFDA Awards earlier this month, which was embedded with over 230,000 Swarovski crystals and left nothing to the imagination.
Meanwhile, Cameron's 'The Other Woman' co-star Leslie Mann is a fan of Poppy Delevingne's more sophisticated and ladylike dress sense, exclaiming: "She's adorable."
'The Body Book' author Cameron is very vocal about her appreciation of the female form and her focus on personal health and fitness, so claims she couldn't bear to choose a favourite body part.
She joked: "It's like asking a mother to choose her favourite child! It would mean the other parts weren't as good. I love my body as a whole."
Leslie added: "I'm just happy to have a fully-functioning body."