Celeb: Jennifer Lopez

Fashion Line: Just Sweet

Qualifications: J.Lo is a true fashionista, but even she discovered that designing isn't as easy as it may look -- Just Sweet is her second attempt at a higher end brand. Judging by the flirty, asymmetrical dress she wore to her runway show, it looks like the second time's the charm!

Celeb: Katie Holmes

Fashion Line: Holmes/Yang for Giorgio Armani

Qualifications: Mrs. Tom Cruise debuted the first dress from her collection with stylist pal Jeanne Yang at L.A.'s Tropic Thunder premiere. Will her line get rave reviews? Judging by how quickly Katie turned from girl next door to style icon, it seems that she's a quick study!

Celeb:Fergie

Fashion Line:Fergie for Brown Shoe, Fergie for Kipling

Qualifications:The Glamorous pop star already has a successful line of bags for Kipling under her belt, so it's no surprise that she branched out into designing footwear. "I'm definitely a shoe lover," Fergie admits. "The right pair of shoes can change the feel of an outfit, and even change how a woman feels about herself."

Celeb:Beyonce (in her own dress)

Fashion Line: House of Deréon

Qualifications:Lady B designs this brand with her mom Tina Knowles, who has been making her daughter's stage and red carpet dresses for years. Mama Knowles isn't a professionally trained designer, but she has a knack for the craft.

Celeb: Matthew McConaughey

Fashion Line: J. K. Livin (Just Keep Livin)

Qualifications: Matthew had no choice but to go out and design his own swimming trunks because judging by how often he wears them, there weren't enough left in the world.