Jennifer Aniston Started This Sexy Trend on Friends That's Still Going Strong

From "The Rachel" hairstyle to slinky slip dresses and miniskirts with knee-high boots, Jennifer Aniston championed so many popular '90s looks on Friends. There was one little faux pas, however, that was widely discussed throughout the 10-season series: Jen's nipples and how visible they were on screen. It's really no big deal - even if the actress had been going braless, that's her prerogative (or perhaps an idea of the costume designer's). By now there are plenty of celebrities - models and Ho...