Three for One 1990 on netflix

Kerry Grant, an ugly girl shunned by all her college friends, including Lou, Miles and Ben, takes revenge a few years later, winning them over in the form of an irresistible vamp with different identities. Before revealing herself, she tests the weasels, promising to choose only one. When Lou, Miles and Ben undergo the final judgment, they are met by the ugly Kerry they picked on in high school.