Celeb: Sienna and Savannah Miller (both wearing their own designer duds)

Fashion Line: twenty8twelve

Qualifications: Sienna looks good in their creations, but we're pretty sure her sister Savannah, who attended London's famous design school Central Saint Martin's, is the brains behind this operation. Even Vogue 's Anna Wintour is a fan!

Celeb: Scary Spice a.k.a. Melanie Brown

Fashion Line: Bras for Ultimo lingerie

Qualifications: Known more for being Eddie Murphy's baby mama and a former Spice Girl, Mel B's shapewear line and whimsical lingerie sets for the well-known bra company Ultimo is surprisingly tasteful, pretty and comfortable -- so comfortable that Mel says "It's not like wearing underwear. I like walking around n*ked so it's perfect for me!"

Celeb: Lauren Conrad (in her Jade bubble dress)

Fashion Line: Lauren Conrad Collection

Qualifications: Two years of sorting samples in Teen Vogue's West Coast fashion closet and a new gig with pal Whitney Port at the fashionable PR firm People's Revolution prepped LC for her own designing gig.

Celeb: Katherine Heigl

Fashion Line: Katherine Heigl Collection

Qualifications:We're guessing that Katherine Heigl is no more a fashion designer than she is a doctor. But she sure looks cute in those scrubs!

Celeb: The Madden Brothers (all wearing DCMA)

Fashion Line: DCMA

Qualifications: Yes, there is another Madden brother. Twins Joel and Benji and their lesser-known, blonde brother Josh are partners in fashion crime. It doesn't hurt that Joel and Benji's respective girlfriends, Nicole Richie and Paris Hilton, regularly rock their BFs' har**ore-inspired gear.