Feb. 22, 2008 -- America's former sweetheart wasn't always so sweet.
In an interview with Oprah Winfrey scheduled to air Monday, former "One Day at a Time" star Valerie Bertinelli reveals that she and ex-husband Eddie Van Halen cheated on each other during their 24-year marriage.
According to "Entertainment Tonight," the Jenny Craig spokeswoman told Winfrey, "I cheated — He claims to this day that I cheated first, but I don't know. I don't know about the timing."
During the interview, which airs the day Bertinelli's book "Losing It: And Gaining My Life Back One Pound at a Time," hits store shelves, the actress also reveals that she used to snort cocaine.
Bertinelli, 47, married the co-founder of Van Halen, the rock supergroup, in 1981. They had a son, Wolfgang "Wolfie" William Van Halen, 10 years later, and separated in October 2001. Bertinelli formally filed for divorce in 2005.