Actress Zoe Saldana, best known as Neytiri in James Cameron’s Avatar, is trading in the blue bodypaint for some swish new undies.

Saldana today became the latest celeb to model Calvin Klein Underwear for the iconic label’s fall/winter 2010-11 collection.

In the promotional …

For the first time, the Calvin Klein men’s underwear campaign will feature four men to promote the new Calvin Klein ‘X’ line, launching Spring 2010.

The four hunky men come from various backgrounds including two American actors, Kellan Lutz of Twilight fame and Mehcad Brooks…