21. Grease 2 (1982)
Director: Patricia Birch
Stars: Maxwell Caulfield, Michelle Pfeiffer, Lorna Luft, Maureen Teefy
Lame Love Song: "Girl for All Seasons," Dominic Bugatti & Frank Muskar
Love Conquers: High school social hierarchy
Though an informal poll of tween slumber parties agreed that Grease needed a sequel, we are pretty sure they would have tapped into their collective Ouiji boards to stop this film from seeing the light of day if they knew what would result.
Since almost no members of the original cast signed on, Grease 2 opted to tell the story of Sandy's English cousin (Caulfield), who was not even mentioned in the original. With songs like "Cool Rider" (which teaches him that he must become a cool biker to get the girl) and the biology-themed "Reproduction," it is a wonder that this musical didn't endure on high school and community theatre stages in the same way as the original.