The possessed-cheerleader movie, Jennifer’s Body, comes out September 19, so we’re on the cusp of another round of insane Megan Fox interviews. So far, Megan has been laying low, and her costar Amanda Seyfried has been taking on the brunt of the early publicity rounds. Now, I like Amanda, but I don’t know that much about her. Her most famous roles thus far have been in Mean Girls (she was one of the Plastics) and Mamma Mia (as Meryl Streep’s daughter). Amanda seems like a sweetheart, but I’m reserving judgment until I see the full scope of the Jennifer’s Body publicity tour.

Recently, Amanda was asked about her kissing scene with Megan in the film. You know it was a guy who asked, and he was probably hoping for a demonstration (in his pants). Amanda was all “meh” and showed off her jaded Hollywood eye by describing how the scene came into fruition: “We knew that it was going to play a really big role in publicising the movie. We kind of rolled our eyes at the idea of having to make out.” She also said that it was a “relief” working opposite Megan because she didn’t have “that weird pressure of feeling like you have to look attractive. In this movie, I didn’t worry about any of that s**t. I don’t want to play the one that everybody is supposed to want to have sex with.”

Amanda is also the cover girl for September’s Allure Magazine (excerpts via MTV). Amanda describes her panic attacks, and how Hollywood is just like high school:

For a 23-year-old college dropout, “Big Love” star Amanda Seyfried has the breadth of life experiences someone twice her age would covet. She spent her childhood modeling. She studied opera. And worked alongside Meryl Streep. She’s even presented at the Academy Awards with Robert Pattinson (swoon!).

To any onlooker it would appear Amanda’s led a charmed life. But it hasn’t been without its trials. The star of the upcoming “Jennifer’s Body” opened up to Allure magazine (see her full cover image after the jump) about her recurring anxiety attacks, her breakout role in “Mean Girls,” and how Tinseltown is one big high school cafeteria.

Amanda is candid about the things she doesn’t like about herself; among them her stubby nails and roller-coaster emotions, the latter of which leads to anxiety attacks at the most inopportune moments. “I suffer from anxiety attacks a lot,” she explained. “Like, the other day, I had an attack in the middle of a relaxing massage: My head was just spinning, and I felt nauseous! I was saying to myself, Just don’t make a scene! Finish this massage, or you’re going to be really annoyed with yourself.”

It’s anxiety, however, that Amanda says gives her acting an edge. Perhaps it was just such an edge that helped her land her breakout role as ditzy Karen Smith in “Mean Girls,” the flick that made stars out of Lindsay Lohan and Rachel McAdams.

“Oh, thank God for ‘Mean Girls’! That put me on the map!” Amanda said. “I definitely knew it would be a success. I was like, There’s no way this movie can go wrong.”

It’s probably fitting then that a former “Plastic” describes Hollywood in terms of a popularity contest. “Hollywood is just like high school: The popular people love the other popular people. And the thing is, some people aren’t nice,” she said hesitantly. “Or they are nice, but only to your face, not elsewhere.”

Amanda is quick to point out that she’s not innocent of girl crimes either. “I do my fair share of judging when I see certain women on the covers of magazines. I think, Why is she on the cover? But then I try to think, Oh, wow — she really does look good.”

[From MTV]

Doesn’t it seem like there’s been a rash of celebrities claiming to have panic attacks recently? In Amanda’s case, I tend to believe it. I’ve had panic attacks before, and they’re no fun. I really thought I was going to die. It felt like an earthquake, my knees buckled, I couldn’t hold my head up. Tough stuff. Most doctors would probably prescribe a low-dosage antidepressant, although Amanda might think that those kinds of chemicals would affect her work as an actress.

Thanks to CoverAwards for the Allure cover. Amanda Seyfried is shown at the Glamour Awards on 6/2/09 and on the set of “Letters to Juliet” in Siena, Italy with co-star Christopher Egan on 8/3 and 8/4/09. Credit: Fame Pictures