Malibu Stacy is a plastic doll that is manufactured within Springfield by the Maliby Stacy Division of PetroChem Petrochemical Corporation. It is the most popular doll in Springfield. Stacy is Lisa's favorite doll, despite some moral issues she has had with the attitudes it promotes. (The doll exists in the Simpsonverse as a parody of Mattel's Malibu Barbie doll and other fashion dolls for girls in the real world.) The name Stacy is derived from the name of the facial mold used by Mattel for its 1971 Malibu Barbie.