Nancy Spungen was a model student, who became Sid Vicious' Girlfriend. After meeting him, they both become addicted to chocolate (replacing drugs in the episode), wich turned their lifes out of control. When Sid destroyed one of the Sex Pistols show, she made him quit the band and start a solo career, with she composing his songs. Nancy is similar to or was played by Lisa Simpson or is who Lisa Simpson disguised herself as.