She said: "I use an electronic cigarette. I know it's ridiculous, but it's helping me not to actually smoke real cigarettes. 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. Smoking sucks!"
The 31-year-old actress – who has adopted 20-month-old daughter Naleigh with husband Josh Kelley – believes she wants to set a good example to her child by not smoking, as she believes its a "stupid thing".
She said: "The one thing I would say to my kid is, 'It's not just that it's bad for you. Do you want to spend the rest of your life fighting a stupid addiction to a stupid thing that doesn't even really give you a good buzz?' "
Discussing her husband Josh – who she married in 2007 – she admits he finds it difficult to watch her undertake kissing scenes on films and would not come on the set of 'Life As We Know It' when she had to get passionate with her co-star Josh Duhamel.
She added to Parade magazine: "Actually, he and Josh Duhamel are good friends, but he would never come to the set when Josh and had to like kiss or make out. It does make him uncomfortable because he's not an actor, he's a musician.
"He always says to me, 'How would you feel if I had to make out with some girl in a video?' And I'm like, 'If you have to do it, you have to do it. But I wouldn't want you to come home and tell me what a great kisser she is and I should try her technique.' "
She added to Parade magazine: "Actually, he and Josh Duhamel are good friends, but he would never come to the set when Josh and had to like kiss or make out. It does make him uncomfortable because he's not an actor, he's a musician.
"He always says to me, 'How would you feel if I had to make out with some girl in a video?' And I'm like, 'If you have to do it, you have to do it. But I wouldn't want you to come home and tell me what a great kisser she is and I should try her technique.' "
