These days, no self respecting celebrity can hold her (or his) head up in Hollywood without a clothing, shoe, handbag, or home furnishings line to call their own. But are these stars really qualified to add designer to their resume? StyleList puts them to the test. First up...
Celeb:Taylor Swift
Fashion Line: L.E.I. Sundresses by Taylor Swift
Qualifications:The young country singer is releasing a line of frocks this February that her die-hard fans will love and moms can afford. We're sure Swift's brand will expand into denim.
Charley Gallay, Getty Images
Celeb: Dita Von Teese
Fashion Line: Science of Sexy for Wonderbra
Qualifications: This burlesque bombshell spends most of her time in scanty skivvies, so we're absolutely confident she is capable of creating amazing lingerie! Of her '40s and '50s-inspired line Von Teese says "Underwear isn't just something that you put on for your lover -- you wear it for you."
Mike Marsland, WireImage
Celeb: Lauren Bush
Fashion Line:Lauren Pierce (hits stores in Spring 2009)
Qualifications: An alum of both Parsons New School for Design in NYC and Central Saint Martins College in London, first niece and former model Lauren Bush definitely has a solid design foundation. Add to that an internship at Zac Posen, a boyfriend with a designer dad (her main squeeze is Ralph Lauren's son) and the success of the popular FEED bags she designed to benefit the U.N.'s World Food Program, and it looks like Ms. Bush has the chops to make her ready-to-wear sustainable fabrics line a hit.
Astrid Stawiarz, Getty Images
Celeb: Eva Mendes
Fashion Line: Vida for Macy's
Qualifications: Calvin Klein's latest controversial ad campaigns features a naked Eva Mendes rolling around on a bed, so perhaps her new venture isn't really all that surprising. The actress and her boyfriend, film producer George Augusto, are launching a collection of sheets and comforters. While neither has any design background, we're betting the betting the lovebirds know how to make a cozy nest.
AFP/Getty Images
Celeb: Mischa Barton
Fashion Line: Mischa Barton for Stacey Lapidus
Qualifications:The former O.C. star gets more ink these days for her hair accessories than her acting jobs so maybe this is a brilliant career move: She's coming out with a line of headbands made from a wide array of materials including silk, feathers and crystals, ranging in price from $40-$200.
Astrid Stawiarz, Getty Images
Celeb: Janet Jackson
Fashion Line:Pleasure Principle
Qualifications:Named after her 1987 hit, the fancy pants (and matching bras) will all retail for under $40. "There's something for every woman, and that's very important to us," Jackson says. "I've always hated when lingerie is uncomfortable, so the fit and comfort was key." Nothing nasty about that, Miss Jackson.
Arnold Turner, AP
Celeb: Lenny Kravtiz
Fashion Line: Inspired by Lenny, Worn by You at Kohls
Qualifications:Hmmm, we're not sure that even Lenny's biggest fans would be inspired to wear this denim, fringe and wings ensemble, but fortunately for those who do want to emulate the the rocker's style, his jeans and t-shirts line for Kohls is a bit more traditional.
Kevin Mazur, WireImage
Celeb: Tara Reid
Fashion Line: Manta
Qualifications:Sometimes an actress, always a party girl, and now a designer. According to Reid her little triangles of Lycra are more than simple poolside attire, "It's about putting into the universe what you want in life: Red means love, pink is friendship, green is lucky, black is protection. You're gonna have a story when you wear this bikini or when you put this dress on: You'll either get love or meet a new friend or you might meet a guy." Big promises from little bikinis!
Casey Rodgers, WireImage.com
Celeb: Katie Holmes
Fashion Line: Holmes/Yang for Giorgio Armani
Qualifications: Mrs. Tom Cruise created her own storm at the LA premiere of "Tropic Thunder," debuting the first piece from her collection with stylist pal Jeanne Yang. But given the dress's sleek lines and navy blue fabric two Giorgio Armani trademarks it's a good bet that Katie got more than a little help from her silver-haired mentor.
Wireimage.com
Celeb: La Lohan
Fashion Line: 6126 Leggings
Qualifications:Lindsay Lohan's collection owes its name to Marilyn Monroe born on 6/1/26 but it doesn't look like she captured what made the '50s bombshell so sexy. Does the modern American woman really need leopard print "ankle gloves"? Or glimmer leggings? Seems like La Lohan is channeling no one but...Lindsay.
Bauer-Griffin
Around these parts, we love any product that makes our hair a little extra sexy, so, of course we're fans of the Sexy Hair line. We've used 
Because sexy models in skimpy lingerie are so pure,
One second he's a no name model barely scraping by, then he's Miley Cyrus' boyfriend and then the next thing you know Justin Gaston has landed the Just Cavalli campaign alongside Kate Moss. You can't tell us those last two things are coincidental.
