What would you do if you looked like Kate Middleton ? Native California girl Melissa Pelz can answer that question. Designer Melissa Pelz The Princess doppelganger moved to London a few years ago to entrench herself in Brit culture, and more than a few folks noticed the future royal resemblance. So in addition to making press appearances, the enterprising Kate look-a-like recently launched the limited edition Ligne de Soie Royal Bridal Collection . Her regal lingerie line includes the Royal Sapphire Silk Nightdress ($150) and the Royal Robe ($279) . The pure white silk robe with matching royal blue sapphire sash and buttons reflects the classic, feminine style that Kate embraces. "It's interesting that because I resemble Kate, people frequently ask me what I think of her style, or what her wedding dress will look like, or [even] what I wear while I'm getting ready to 'become her,'" says Melissa. "I think that overall she's got a s...