Holly Sue Cullen (born December 23, 1979), the model is known mostly as Holly Madison, is an American model and television personality. She is best known for being one of Hugh Hefner's girlfriends on the reality television series The Girls Next Door. She also had her own reality series, Holly's World.
- "Holly Madison: Biography". TVGuide. Retrieved 2 October 2015.
- "Biography". HollyMadison.com (official site). Archived from the original on 2 October 2015.
- Rebecka Schumann (19 June 2015). "'The Girls Next Door': Where Are Holly Madison, Bridget Marquardt And Kendra Wilkinson Now?". IBT Media Inc. Retrieved 2 October 2015.