28. Hayden Panettiere
Biggest accomplishment this year: Receiving a Golden Globe nomination for Best Suporting Actress, for ABC's Nashville
Hayden Panettiere, the pint-size star of ABC's country music soap opera Nashville, provides the show's sass and sexual as the feisty singing sensation Juliette Barnes. On the show, the former Heroes scene-stealer is tough, confident, not afraid to diss and dismiss her haters, and tactical enough to use her disarming good looks to her advantage.
She's vulnerable, too, a facet of her character that's allowed Panettiere to show and prove as a dramatic actress. Considering her recent Golden Globe nomination, the industry is taking notice.