Amanda Seyfried and her adorable boyfriend, Dominic Cooper, already tackled an attempted marriage on a gorgeous, picturesque Greek island in "Mamma Mia," (all while busting out in Abba tunes and dancing next to Meryl Streep, natch), but they about to enter more mature, less sing-songy territory.
A girl on girl kiss.
That's right, in case you hadn't heard already, Amanda and her "Jennifer's Body" costar Megan Fox have an intimate moment in Sept. 18th horror flick, in which they play high school besties. So how did Dominic handle the, er, action? "He was totally turned on by it," Amanda told MTV News during the Toronto Film Festival. Can't say we're surprised, can we?

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