But the reality TV star hasn't let it rattle her confidence.
The 5ft 7in former Playboy model has allowed unretouched bikini pictures of herself to be published in American magazine Life & Style.
'I have cellulite - and had it even when I was at my absolute thinnest,' she tells the publication. 'I’m never not going to have cellulite.
'People need to just accept that it’s there and maybe dress accordingly or use body makeup to cope with it.'
Madison, who weighs 115 pounds, was told by producers to lose the 15 pounds she gained when she moved from the Playboy Mansion to Sin City.
The blonde confessed: ‘Once I realised that other people were noticing that I’d packed on a few, I was embarrassed to go onstage’.
The 32-year-old admitted that it was easier to stay fit while she was one of Hugh Hefner's kept ladies.
Madison says: ‘I didn’t have a job. There wasn’t much going on, so you tended to focus on the way you looked all the time’.
