Watch this Alvin and the Chipmunks: The Squeakquel edition for green tips from Christina Applegate, Amy Poehler and Zachary Levi. (Video by Gerri Miller)
Read more about the stars of the new Chipmunks movie in Gerri's weekly column.
Zachary Levi: Hi, I'm Zachary Levi from Chuck and also Alvin and the Chipmunks: The Squeakquel, and my green tip of the day is a simple one. It's just turn off a light switch when you're not in that room. I was raised in a home that it was important to do that and it's kind of stuck with me, and it's certainly helped with my electricity bills, and I think it will with yours.