Iris Kyle has the most Ms. Olympia wins of any bodybuilder in history, with 10 victories. However, there’s controversy as to how many Ms. Olympia wins Iris has. In 2001, Kyle competed in one of two weight classes and then there was also an overall winner from both classes combined.
Iris won the heavyweight class competition but lost the overall Ms. Olympia competition, which included both classes. The fact that she did have a victory that year has caused confusion as to whether or not Iris won that year’s Ms. Olympia.