It's a "shake, rattle and roll" kind of life for Jessica Simpson! A magnitude 6.6 earthquake shook Simpson in Japan -- and the songstress turned to Twitter to talk about the experience.

"Thought I was hallucinating," she tweeted on Monday. "I have never felt anything like this in my life. Laying in bed watching CNN," the 29-year-old added.

The earthquake struck Japan's Tsuruga Bay. No casualties were immediately reported.

Simpson has begun filming her new VH-1 series "The Price of Beauty." Cameras will follow Jessica as she visits seven different countries to document the lengths to which women go to achieve beauty.