Look who’s using Foursquare

Barbie is getting social. Yup, the now old battle-ax and one time plastic, blond bombshell is employing social media to market her aging self. She’s using Fourquare. “With a camera on her chest and an LCD screen on her back, the newest Barbie doll will kick off sales with a Foursquare-powered scavenger hunt in four cities across the U.S,” reports CNet. “The hunt — which begins Tuesday in San Francisco before heading to Los Angeles, Chicago, and New York — asks Barbie f…