Katherine Heigl birthed a baby boy in December, but she’s still a stunner — and was staggered when a teenage girl spotted her on the street, yelling that she’d just started watching “Grey’s Anatomy” reruns, then gushed, “OH, WOW — you look just like Izzie! Are you her MOM?” … OUCH!!
Giggled my spy-witness: “Katherine, who played knockout ‘Dr. Izzie Stevens’ on the long-running medical drama until seven years ago, went into total shock and wailed, ‘That’s about the worst thing you can say to an actress — it really hurt! That girl actually thought I was my own character’s MOTHER!’”