The "100 girls/women movie" likely refers to the 2000 teen comedy 100 Girls, where a high schooler, Matthew, spends a night with a mysterious girl during a blackout but doesn't learn her name, then searches a girls' dorm for her, mistaking her for his "true love," using a pair of panties as a clue, while a friend helps him gain confidence, encountering various girls along the way, including Wendy (Larisa Oleynik) and Arlene (Katherine Heigl). There's also a less prominent 2002 film called 100 Women, about an art student helping a girl named Hope, but 100 Girls is the well-known film matching the "100 girls" premise.