Forbes has named Oprah Winfrey the most influential Celebrity in America for the second year in a row. The magazine ranked celebrities based on E-Poll Market Research surveys -- which asked Americans about celebs' likeability traits and personality attributes.

Oprah was rated 48% influential. In second place was Director Steven Spielberg, who earned a 47% influential rating. Rounding out the top five were: Martin Scorsese, Ron Howard and George Lucas. (POR)