If her names not entirely familiar yet, know that youve already seen Seyfried all around town on those ubiquitous Mamma Mia! billboards. (Spolier: She steals the show as the only Mamma actor who can really sing.) Seyfried, who played the ditzy Karen in “Mean Girls,” has worked steadily since, appearing on CSI, Veronica Mars and now regularly on HBOs Big Love. Shes also on tap for Girlfight director Karyn Kusamas darkly comedic thriller Jennifers Body. (Evan Agostini / Associated Press)
When Mean Girls catapulted Lindsay Lohan into the big time, her taste in movie roles fell just as quickly. There was Disneys middle-of-the-road Herbie: Fully Loaded, the laborious Georgia Rule and the Razzie Award magnet I Know Who Killed Me. With her addictions and love life now seemingly in check, it’s business as usual. Lohan next stars in the comedy Labor Pains” as a woman who pretends to be pregnant to avoid getting fired from her job it features American Idol finalist and Chicken Little doppelganger Kevin Covais, so were not sure whether or not this is a good move -- and this fall she stars as Bettys former high school nemesis in Ugly Betty. (Tracy Bennett / Associated Press)