Hilary Duff went shopping in Studio City yesterday to grab plenty of groceries at Whole Foods, and with her glasses on and a smart plaid coat, she looked like she was headed off to do something vaguely intellectual! We won't know for sure (maybe she just wanted to dress up in case she met Splash?), but what we do know is that she's going to be making an appearance on Ghost Whisperer with her friend Jennifer Love Hewitt.