Katherine Lights Up Our Lives

We're always thrilled to catch Katherine Heigl in the act of doing, well, whatever - after all, even when she's turning us down, she's still a paragon of politeness to the paps!

Yesterday, for instance, the Knocked Up starlet had to ask one of our photogs to make way since she was in a bit of a hurry to pick out a light fixture, eventually settling on the Sputnik Chandelier she's holding in the above photo. Heck, she almost sounded like she was apologizing to the guy for inconveniencing him!

Oh, Katherine - if you want to light up a room, all you need to do is smile!