Motley Crue rocker Nikki Sixx regrets revealing all about his fling with Iron Maiden star Bruce Dickinson's ex-wife in band autobiography THE DIRT - because he's convinced the British singer had no idea about the romance. Sixx has since discovered that DICkinson penned Tattooed Millionaire about the bass player after reading about the affair. Sixx tells, "I f**ked his wife, and I think he was upset. "That wasn't my fault... I want to go on the record. She was his wife, but I didn't know that. I don't think Bruce found out about it until The Dirt. I should have kept that a secret."