After Beckham, Nadal to model Armani undies

No doubt she knows fashion

These days, celebrities like Fergie and Heidi Klum are heating up runways and department stores with their own fashion lines. Find out how Hollywood’s finest are joining the fashion industry – and whether their brands are succeeding or failing.

Here, L.A.M.B. by Gwen Stefani fashions are presented during the fall 2010 Mercedes-Benz Fashion Week, in New York, on Feb. 11, 2010.

The singer and celebrity mom branched into high-end fashion and has received rave reviews for several of her collections. "I started L.A.M.B. so I’d have a creative outlet after my music career and it’s just taken off," she said to the Associated Press. "But I would have never done it if I wasn’t going to do it for real.” (Timothy A. Clary / AFP - Getty Images) Share Back to slideshow navigation

Wear it like Beckham

When your nickname is “Posh,” it’s only a matter of time before you try your hand at fashion. The former Spice Girl and wife of soccer star David Beckham, often seen dressed in skinny jeans, launched her collection, called "Victoria Beckham Denim," at Bergdorf Goodman on Feb. 16, 2010, in New York City. Composed of denim jackets, cutoff shorts and leggings, the collection starts at $230. (Andrew H. Walker / Getty Images) Share Back to slideshow navigation

Fergalicious footwear

“I’m definitely a shoe lover,” said singer Fergie in an interview with Reuters about her new shoe line partnership with Brown Shoes. “The right pair of shoes can change the feel of an outfit, and even change how a woman feels about herself.”

The shoe collection, which hit stores in March 2009, includes sky-high platforms and sandals in fun colors and contemporary designs. (Jason Merritt / Getty Images) Share Back to slideshow navigation

Making it work

“Project Runway” host and supermodel Heidi Klum promotes her 20-piece jean collection for Jordache on Sept, 9, 2008, in New York City. Klum reportedly provided the famous jeans company with favorite pieces from her own wardrobe to help inspire the line’s style, which she hoped would cater to busy young moms. (Gabriela Maj / Getty Images) Share Back to slideshow navigation

Animal-friendly fashion

Natalie Portman celebrated the launch of her vegan footwear line at Te Casan on Feb.12, 2008, in New York City. The “Star Wars” actress helped design the shoe collection, which featured flirty feminine styles like red faux-patent leather Mary Jane heels and satin ballet flats.

In less than a year, however, the Natalie Portman Collection for Té Casan folded after its parent company closed up shop. (Astrid Stawiarz / Getty Images) Share Back to slideshow navigation

Hand it to me

Camila Alves launched a luxury handbag line called “Muxo,” who is a “goddess of the water” in African legend, at L.A.’s trendy Kitson stores. The model and mother to Matthew McConaughey’s children used Brazilian leather and hardware for her collection, which was also partly designed by her mother.

In late 2009, however, Kitson claimed Alves’ line wasn’t selling because she didn’t promote it well enough. (Michael Buckner / Getty Images) Share Back to slideshow navigation

Best foot forward

Indie style icon and “Big Love” actress Chloe Sevigny launched the Chloe Sevigny Clothing Line for boutique Opening Ceremony. According to an interview with New York magazine, the star took inspiration from records by David Bowie and The Smiths. “I thought of things I’d always wanted other people to make and we just made them,” she said. () Share Back to slideshow navigation

Common knowledge

Grammy-winning rapper Common attends the MAGIC convention to help launch Software, a collaborative line of clothing with Microsoft on Feb.18, 2009, in Las Vegas. The collection included Common’s T-shirt designs, which incorporated retro computer graphics. (Isaac Brekken / Getty Images) Share Back to slideshow navigation

Cruz-in for it

Monica (L) and Penelope Cruz (R) present the Spring/Summer Mango Exclusive Collection of Penelope & Monica Cruz for MNG. The genetically blessed Spanish sisters helped design the 25-piece collection, which ranged from sexy tight dresses to relaxed blazers. (Carlos Alvarez / Getty Images) Share Back to slideshow navigation

The Hills are alive

Reality TV star Whitney Port walks the runway at the Whitney Eve Port show at the Gen Art 6th Annual Fresh Faces in Fashion Show during the opening of FASHIONmiami on Mar. 10, 2010.

Just two weeks later, a lawsuit was filed against Port by a designer who claims she did most of the design and wanted to be compensated accordingly. In the court document, designer Adrienne Baravetto claims the two had an oral agreement for an $80,000 annual salary and 25 percent of the company. Whitney’s representative told TMZ the lawsuit was “baseless and without merit.”

Port once worked as an intern at Diane Von Furstenberg during her time on the MTV reality series “The City.” (John Parra / WireImage for Feinberg) Share Back to slideshow navigation

Richie’s rich style

Former reality TV star and party girl Nicole Richie settled down in the last few years. The daughter of Lionel Richie married rocker Joel Madden, with whom she has two kids, established a children’s charity organization and launched her own line called Winter Kate. Named after her daughter Harlow’s middle names, the 40-piece collection is partly inspired by Richie’s own hippie-glamour aesthetic. () Share Back to slideshow navigation

Dress like a rock star

... or at least Sheryl Crow. The singer-songwriter launched a line called Bootheel Trading Co. The vintage-inspired collection is a nod to Crow's Missouri roots and personal style. The line, which includes 11 different jean styles, vests, a variety of tops, jackets and hoodies, all at affordable prices, also features graphics inspired by her song lyrics. (Ethan Miller / Getty Images) Share Back to slideshow navigation