Girl on Girl Alert: Megan Fox has filmed an erotic lesbian love scene with Mamma Mia! star Amanda Seyfried for the upcoming horror-comedy Jennifer’s Body.

“The two girls make out hardcore, rolling around in a bed. It was a really hot scene,” a source tells the New York Daily News.

Megan, hailed by FHM Magazine as the “World’s Hottet Woman,” plays a possessed cheerleader who goes on a killing spree murdering her male classmates.