Madison Bell is the main antagonist of the 2002 teen thriller film Swinfan. She was portrayed by Erika Christensen.
Madison abused her boyfriend Jake Donnelly and got car crash which left Jake into coma and Madison survived. Afterwards Madison met Ben Cronin, a star swimmer of high school's swim team whom she drop her notebook and Ben gave to her although Ben had girlfriend named Amy and Madison's cousin was friends with Ben, her flint and incrution of Ben which led her to seduced him into sex in the pool. He feels guilty for cheating on Amy but he was shocked to find out that Amy had made friends with Madison and she's dating Ben's teammate Josh who addicted to steroids. Madison framed Ben by using Josh's urine which he is disqualified at swimming competition, Josh came realized that Madison was obsessed of Ben as he tried break up before she kills him and framed Ben as Josh's murderer until Ben's best friend Christopher told Ben about Jake Donnelly and visited him in hospital. Both Ben and Christopher set up for trap for Madsion and records of her crimes where she tried to kill Jake before she was arrested but she escaped and kidnapped Amy as her hostage to forced Ben to saved his girlfriend. Madison handcuffed and chairbound pushed Amy into swimming pool and Ben watched in horror rushed to saved her but Madison attacked them with pool cleaner before Ben pulled it into the pool causing Madison to drown.