Claudia Schiffer

Celebrities worked a number of noteworthy trends — fancy sneakers, tuxedo pants, colorblocked dresses — in 2012, but colored denim was the one fad that trumped them all. Hollywood trendsetters like Jessica Alba, who was dubbed the colored-jean queen by her stylist Brad Goreski, Jordana Brewster, and Olivia Palermo were just a few fashion mavens to don this bold denim style, showcasing the trend's versatility for both casual and evening events. Cruise through to see which other fashionistas were spotted rocking rainbow-hued bottoms this year, then score a pair for yourself to instantly amp up your closet staples.

The '90s was a decade devoted to supermodels, and few were as recognizable as the blond stunner known as Claudia Schiffer. From being discovered in a German nightclub (at only 17 years old) to practically going straight onto the covers of Elle, Vogue, Cosmopolitan, and Harper's Bazaar, just to name a few, Claudia set the standard for the sexy supermodel — and to this very day, she still continues to wow us with her classic, ageless beauty. In honor of her 42nd birthday tomorrow, here are our favorite Claudia cover girl moments from the '90s.

Source: Vogue

The mixed-prints trend has been around for some time now, but it's still going strong in Hollywood. Emma Watson worked a printed blouse with a contrasting skirt at the 2012 Tribeca Film Festival, and a handful of other celebs like Whitney Port, Claudia Schiffer, Diane Kruger, and Scarlett Johansson have also embraced mismatching. With Spring in our midst, it's the ideal time to dabble with the trend if you haven't already. Need inspiration? Step inside to see seven of our favorite matchups brought to you by Hollywood's most style-savvy ladies.

The colored-jeans trend has spread like wildfire in Hollywood, and Jessica Alba isn't the only one obsessed. Though it's likely that Jessica owns the most colored jeans — purple, highlighter blue, and peach, just to name a few — others like Claudia Schiffer, Kristin Cavallari, Minka Kelly, Stacy Keibler, Jamie Chung, and Pippa Middleton have also gotten in on the craze. If you need fresh inspiration on how to wear your colored denim, click through to see how a handful of celebs worked theirs. Then shop your favorite hues to grow your collection.

>> Supermodel Claudia Schiffer hasn't aged a day since her first campaign for Guess in 1989, and now she's back to help the brand commemorate its 30th anniversary.

Schiffer posed for photographer Ellen von Unwerth — who shot the first few Guess campaigns in the '80s — for new photos that evoke the black-and-white sultriness of the original ads. Unveiled today, the new images capture the ageless Schiffer celebrating "30 sexy years!" of the brand. Schiffer told WWD that nothing has changed since she last worked with the brand: "Guess will always have a soft spot in my heart, and I'm excited that 23 years later we can still work together so successfully."

The pieces Schiffer wears in the ads are part of a capsule collection that will be sold this year. Take a look at a few images, old and new, here.

One look at Claudia Schiffer in these iconic Guess ad campaigns and we immediately get transported back to the late '80s and early '90s. Remember the days when we used to wear high-waisted jeans with lace tops? Well, those days might be coming back, thanks to Guess's 30th anniversary campaign featuring the supermodel once again. Schiffer looks like she hasn't aged a day, replicating her old Guess ads shot by famous photographer Ellen von Unwerth. "She was a turning point of Guess; she was a turning point of Ellen's career; Guess was a turning point of a life for Claudia," said CEO and creative director Paul Marciano. "Everybody talked about the Guess Girl." In celebration of Guess's 30 years, the brand will also be launching a special 15-piece capsule collection inspired by Schiffer and other Guess models, featuring Anna Nicole Smith printed tees, cutoff jeans originally modeled by Adriana Lima, and a cheeky gingham top worn by Eva Herzigova. Prices range from $39 to $138, and will be available April 24 at Guess flagship stores, Macy's, and on its new website, guess1981.com, launching soon for its anniversary. Check out more iconic images of Claudia Schiffer in Guess ads, present and past, and tell us what you think in the comments section below.

In the late '80s and for most of the '90s, Claudia Schiffer was that impossibly beautiful, curvy blonde with an uncanny likeness to Brigitte Bardot, gracing many a Guess ad campaign and magazine covers including Vogue, Elle, and even Playboy. Countless covers, editorials, and ad campaigns later, Claudia Schiffer is still impossibly beautiful, if more lithe than ever. On the red carpet in Cannes this Summer, Claudia dropped our jaws in a sexy lace gown; in a recent editorial for Vogue Deutsch, she looks like a playful, sexy 20-something. We're fascinated by Claudia's evolution, and in honor of her 41st birthday today, we're taking a look back at some of her most memorable photos. Click through to see each one.