Holly Madison reveals new year's diet secrets

Mama-to-be Holly Madison stays healthy by keeping her diet goals realistic.

"Expecting to stick to a full diet makeover for a whole year can be a little intimidating," Madison wrote on her blog regarding New Year's resolutions.

Instead, she said "vowing to change one habit and sticking to it can make a bigger impact."

"I started drinking a green smoothie every morning several months ago, and it's been the best diet decision I've ever made!" said the "Girls Next Door" star.

Madison is expecting her first child with boyfriend Pasquale Rotella.