Jessica Simpson rocks out in Philly

Jessica Simpson leaves a radio station in Philadelphia yesterday (08/25/06).

Singer-actress Jessica Simpson made a brief, low-key radio appearance at the XM Satellite Radio studios in Washington, DC to promote her new CD, "A Public Affair."

Simpson was on the Chris Booker radio show to discuss the national release on Tuesday of her CD. Simpson then briefly said "hi" to some gathered fans as she left Philadelphia.

Jessica has revealed she lost eight pounds in just two weeks so she would look her best at the Teen Choice Awards.

She said: "I have been working out five days a week for two hours a day. There are no tricks. There is no easy way."

Before beginning her gruelling diet and exercise regime, the 'Dukes of Hazzard' actress went on a pre-diet binge.