Vanessa Hudgens's Acting Secret: Chowing Down on Croissants

Before playing a homeless, pregnant teen in her new movie Gimme Shelter, Vanessa Hudgens paid a visit to Cannes – and she credits French cuisine with helping her pack on the pounds to look right for her role.

In particular, she thanks croissants.

“Oh my gosh, it was the easiest and most amazing thing ever,” she told reporters at the film’s Cinema Society and Alice & Olivia screening in New York City Wednesday. (the film opens Friday.)