Kristanna Loken - black body paint
This leggy Norwegian-American was granted overnight fame when she was cast as the 'Terminatrix' in Terminator 3: Rise of the Machines (a surprisingly excellent sequel to James Cameron's originals). She'd been working steadily in TV before then, including recurring roles in Mortal Kombat: Conquest and Philly. Since earning her big break, she's done the Uwe Boll game-to-film adaptation BloodRayne and returned to TV with a role in US lesbian drama The L-Word.
I'm not sure what the liquid is all over Kristanna's chest in these pics, but the effect is fantastic.