Ashlee's Second Act

About to turn 21, Jessica's little sis is back in the spotlight with a new album, a new style and her own voice. By Serena Kappes with Carrie Borzillo-Vrenna

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Simpson gives a tongue-in-cheek response to gossip that she had designs on Valderrama in the video for her single "Boyfriend." "The concept is that I stole somebody's boyfriend, but there's no real proof of it," she says of the clip, which she filmed while cruising in a vintage black Mustang in downtown Los Angeles on Sept. 1. "It was me and my mom's idea. We thought it would be funny."