Noticed: Leighton Meester

Gossip Girl star Leigton Meester looked chic in a mirrored Missoni skirt and Sergio Rossi pumps for the premiere of her indie flick Remember the Daze in Beverly Hills.

Noticed: Nicole Richie

Nicole Richie accessorized her Jet Jeans and a sheer tee with sunny yellow Louboutin platforms and her signature Balenciaga bag.

Noticed: Eva Mendes

Gorgeous Eva Mendes wore a sheer, sexy Calvin Klein gown recently to an event. In other Eva news, the actress has signed on to be the new face and body of Calvin Klein underwear, including their new “Seductive Comfort” collection. In a statement, Mendes says “The company has such an incredible creative legacy. I’m honored to be associated with such an iconic, world-class brand like Calvin Klein Underwear.”

Cant wait to see the ads!

Noticed: Ashlee Simpson

Popstar Ashlee Simpson worked the sheer trend in a Vena Cava top and J Brand Jeans.

trend: SHEER

Sheer fabrics make a grand entrance into fashion this spring. The unveiling of sheer materials and details on dresses and skirts is a definite sign that fashion is saying goodbye to dressing little girls and hello to dressing women. The sheer trend can be incredibly sweet and sexy if done right. Many blouses, dresses, skirts and even lingerie are available in sheer, luminous fabrics. Pair a sheer top with jeans, or wear a dress that has some sheer component to it. It goes unsaid than when wearing this transparent trend too much sheer can equal a sleezy look. Subtleness is key. Here is some of the best!

Top to Bottom: Juicy Couture, Paul & Joe, Harlow, Victoria's Secret, Rebecca Taylor, Forever 21, Joie, Alice + Olivia, Jill Stuart.