Roll out the pink carpet, grab a feather boa and throw open those Malibu Dream House doors. It’s Barbie’s 50th, and the iconic doll, unveiled today in her latest swimsuit, has plenty to celebrate. Only this American institution could have inspired Barbara Karleskint, 48, to spend nearly $700 so she and one of her dolls could wear matching red chiffon gowns and capes at an annual collectors gathering