08/28/2009 AT 09:20 AM EDT
"I feel much safer with girls, so I felt more comfortable kissing [Amanda Seyfried] in the movie [Jennifer's Body] than kissing any of the other people that I had to kiss. I think she was extremely uncomfortable … and there was a lot of laughing – like, giggling fits that happened in between takes."
, 23, to MTV News
, on puckering up and shooting her latest movie.