Katherine Heigl has tried everything to quit her long standing nicotine habit. The patch. The gum. Chantex. Twice.

Now she’s smoking electronic ciggies. “I know it’s ridiculous, but it’s helping me not to actually smoke real cigarettes,” she told Parade. “You feel like you are smoking, and you get to exhale but it’s just water vapor and not nicotine. I’ve been doing it for six months. ”

]]>David Letterman how she smokes her electronic cigarette and he got just a little too into the whole concept. “I’m essentially humidifying the space,” she said as she puffed away. That’s great, Katherine. But they may also be harmful since the gadgets are poorly regulated and do deliver small amounts of vaporized nicotine. The FDA has also determined that they also contain carcinogens and toxic chemicals such as diethylene glycol, an ingredient used in anti-freeze. What do you think? Is Katherine still gonna have to sit in the ‘smoking is for stupid people’ section? Follow Zap2it and Elizadish on Twitter and Zap2it on Facebook for the latest TV, movie and celebrity news Video credits: David Letterman