Megan Fox may have filmed the new Emporio Armani underwear ads in which she looks sexy and self-assured, but the Transformers star says it’s all an act.

“There are some women you could put in underwear and photograph them, and it looks really classy and it doesn’t necessarily provoke a pinup image,” she tells W magazine [via ET Online], which hits newsstands on Feb. 23.

“But with me it does, immediately, as soon as I’m in underwear. I’m a Vargas girl.”

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Despite her perfect body and sultry Armani ads, Megan admits she’s uncomfortable in front of the camera. “I feel intimidated by fashion. I hate doing photo shoots.”

She also confesses to finding acting a struggle, blaming her nerves on her performance. “I have no confidence, and because of that I’m always second-guessing myself.”

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Apart from her longtime love Brian Austin Green, Megan steers clear of other Hollywood stars, particularly the women: “I especially don’t trust girls in this industry, because it’s incredibly competitive, and I’m just not interested.”

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