Hawkins, Imbruglia Aus's 'Sexiest Women'

Jennifer Hawkins and Natalie Imbruglia have been named two of Australia's 'Sexiest Women'.

The supermodel and the X Factor judge, together with Packed to the Rafters actress Jessica Marais, stripped down to swimwear for the cover of Who magazine's annual Sexiest People issue.

Hawkins revealed the secret to her and boyfriend Jake Wall's chemistry, saying: "Wearing a beautiful G-string under your dress is sexy. I love wearing matching sets - to me, that's sensual.

"[We have] always had the spark and I think once you've got it, it's easy to keep. You've either got a connection with someone or you don't. Having that sexual chemistry is a big tick."

Marais said of her recent engagement to co-star James Stewart: "Getting engaged has been amazing - there's something about the freedom that comes with that kind of security that's really sexy, because there's a lot of trust."

Meanwhile, Imbruglia insisted that she is "just friends" with rumoured boyfriend Justin Hemmes and revealed that she is looking for "a sense of humour", "confidence" and "magnetism" in a man.

Hawkins denies engagement to Wall

Jennifer Hawkins has denied that she is engaged to Jake Wall.

The Australian supermodel, who was believed to have agreed to marry long-time boyfriend Wall after she was spotted wearing a diamond ring on her finger, is reportedly not planning a wedding.

Hawkins's agent Sean Anderson told The Daily Telegraph: "She often wears a ring on that finger. She quite likes to break the fashion rules. They're not engaged."

The former Miss Universe apparently moved in with bricklayer Wall in March this year.