Some celebrities may not be aware that thin black fabric + camera flash = nipples galore. And if not, may they never learn. But when it comes to Kelly Brook, Carmen Electra, and Rihanna, we’re pretty sure they know exactly what they're doing when they strut out sans bra for the photogs. Eagle-eyed paparazzi were able to capture each of these sexy stars in a see-through moment most savorable last week. That's thrice as nice!