Kate Middleton vs. Pippa Middleton — Fashion Face Off.

Kate Middleton, 30, made the blue wrap dress she wore during her official engagement announcement with Prince William in November 2010 instantly iconic. Style-savvy shoppers snapped it up so fast that it sold out in less than 24 hours, and the dress was replicated for the Duchess of Cambridge's wax figure at Madame Tussaud's wax museum in London. So it was quickly recognized when Kate's younger sister, Pippa, 28, stepped out in a different shade of the same Issa "Forever" dress last week, just a year and a half after Kate made it famous. Pippa's been known to upstage the competition, and this was certainly a smart way to steal the spotlight! But did she don the dress as well as her sister? Sounds like this all-Middleton edition of our style showdown is on!

Big sister Kate debuted a royal blue version of the dress (appropriate, no?) with black heels and minimal jewelry, which of course included her engagement ring, an 18-karat oval sapphire surrounded by diamonds that was selected by the late Princess Diana for her wedding to Prince Charles. The sparkler cost $60,000 in 1981. The frock played up Kate's fit physique, which, as was recently reported by British magazine Now, she maintains with an hour-long workout every morning using only a gym ball and dumbbells, and no personal trainer.

Pippa, whose own figure inspired a "butt lift" craze following the royal wedding in April 2011, wore the raspberry version of the dress for last weekend's nuptials of her friend Camilla Hook to Sam Holland, the grandson of Lord Richard Atten borough, in Scotland. She also donned a rosebud fascinator, a black handbag, and black pumps as she reportedly read the lyrics to Bob Dylan's "Forever Young" at the ceremony and mingled with guests.

Now, both Kate and Pippa selected a gorgeous garment. The wrap style of the dress makes it flattering for all body types — not that either of them need any help in that department! And they've both chosen shades that contrast nicely with their dark hair. While I prefer Kate's locks without a fascinator, Pippa can't really be penalized for wearing something that's a wardrobe staple in her world. (Although she probably won't be wearing many hats if rumors that she plans to move to New York City prove true.) The real tie-breaker then is that Kate made the dress memorable, so anyone else wearing it is going to seem as if they're simply recreating a look that truly belongs to her.  By the way, i love they both. :)