Crazy Twitney Spears has come up with a Twinkie Defense to explain her rash of looney antics. Britney Spears is addicted to sugar, according to a physican who studies food addictions. Britney’s irrational behavior — from shaving her head to attacking a car with an umbrella — can partly be attributed to her toxic diet of caffeine drinks and fast food, Dr. Brantley believes. In other words, The Cheetos Made Her Do It.

“When you take a look at Britney Spears and her behavior, it’s very frightening,” Dr. Timothy Brantley, a PHD who educates patients on the power of food, tells ET. “She’s a person who’s completely addicted to sugar. This is like heroin for a junkie. She’s literally on a roller coaster to hell.”

“Caffeine and sugar in this drink will drive your blood sugars and hormones crazy and it can effect your mood for hours,” Brantley said of Starbucks Frappuccino.

“And of course irrational behavior follows that,” Brantley said. “Once you get a quick rise and a quick drop, the body is back in a craving cycle again.”

The doctor claims the content in her extra large soda could cause memory loss, inattentiveness and anxiety.

“If you flood your body with sugars and all of a sudden you become really hyper, I think your judgement is going to be really altered,” he says.

“It’s toxic to the liver,” he said. “It’s going to mess up your hormones.”

The pop tart recently hired a nutritionist to monitor her dietary habits.