Petra heated up the frosty set in a series of skimpy sets

The 28-year-old set tongues wagging at last month's Oscars after she arrived arm-in-arm with actor Sean Penn, 47, who recently split up with his wife, Robin Wright Penn, after 11 years of marriage.

The unlikely pair were the talk of the town after they were spotted cosying up at Elton John's annual AIDS Foundation post-Oscar party.

They also reportedly enjoyed each other's company at Los Angeles club Villa this month.

But the model has talked down rumours of a budding romance.