Former Hollywood madam Heidi Fleiss broke down on the witness stand Tuesday as she explained to a jury how ex-fiancé, actor Tom Sizemore (Black Hawk Down), abused her during their relationship. In 2001, she testified, Sizemore hit her so badly they couldn't go to the premiere of his film Black Hawk Down. Sizemore has pleaded innocent to 16 misdemeanor counts of hitting, harassing and threatening Fleiss. He faces up to 13 years in prison if convicted of all the charges. Sizemore's attorney, Michael Fitzgerald, insists Fleiss is lying.