As multimedia momentum goes, no one need teach 19-year-old Hilary Duff a thing. For the past decade, she has built a career that began on TV, peaking in 2001 with her title role in Disney's 65-episode "Lizzie McGuire," making her a name brand among tweens.

Two years later, she recorded a full-length studio album, "Metamorphosis," which catapulted to No. 1 on The Billboard 200, and the single "Come Clean" hit The Billboard Hot 100's top 40. The project sold 3.7 million copies—and a MTV star was born.

With her upcoming "Dignity," due April 3 via Hollywood, Duff is coming out with the majesty of a high-class debutante. Duff co-wrote all songs on the album with A-lister Kara DioGuardi, including the uptempo single "With Love." The artist is also promoting her new Elizabeth Arden fragrance, With Love, in addition to a clothing line, Stuff by Hilary Duff, available at mass-market retailers Wal-Mart, Kohls and Target.

"I know how lucky I am, but I've worked hard," Duff says. "Who could complain? I've traveled the world multiple times with so many rewards."

For the new album, Duff insisted on being more involved. "I knew I couldn't do it myself, but working with Kara allowed me to talk about things on my mind. It was one big therapy session." During the songwriting process, Duff endured the full scope of a relationship—true love, doubt, breakup and resolution—all of which play out during the course of the set's 14 tracks.

Click here to read more about Duff's songwriting progress, Hollywood Records' promotion strategies, her headling tour and more.