He was a teen idol best known for his characters Chachi Arcola on Happy Days and Joanie Loves Chachi and Charles on the hit 1980s sitcom Charles in Charge. Scott Baio's good looks, charm and wit helped him maintain success "post-Chachi" as an actor, producer and director...but fame like that of "Chachi" is hard to come by twice. A playboy, who virtually haunted Hugh Hefner's mansion, dating countless centerfolds in addition to blonde bombshells Pamela Anderson and Heather Locklear, Baio has made a comeback with the reality show, Scott Baio is 45...and Single.