Katherine Heigl -- Smokin' Hot Butt-head

9/18/2007 9:25 AM PDT
She plays a doctor on TV -- so shouldn't she know smoking is bad for you!?

TMZ caught amazingly gracious Emmy winner Katherine Heigl outside the Ivy yesterday, where she was having a celebratory lunch with her mother. Lighting up a cigarette and puffing away as she signed photo after photo for all the autograph hunters, Heigl was extremely generous to the paps -- and at one point even signed our photographer's arm!

Hi-gull's mom had to step up and play handler for a moment -- calling a code red and whisking her daughter from the crowd and into her car.