Amanda Seyfried: Breakthrough Female Star of the Year!

Amanda Seyfried wows the crowd in Valentino as she accepts the award for Breakthrough Female Star of the Year at the ShoWest awards ceremony at the Paris Las Vegas on Thursday (March 18).

The 24-year-old actress, who finished her look with Jimmy Choo heels, also had her upcoming film, Letters to Juliet, screened at the conference!

The film, due out in May, tells the story of an American girl who visits Verona and responds to letters sent to Juliet Capulet seeking advice about love.

Other celebs feted at the conference included Vanessa Hudgens, Katherine Heigl and Zach Galifianakis!

10+ pictures inside of Amanda Seyfried at ShoWest 2010…