Jessica Simpson and the Therapist

"Yes I have," the singer-actress tells Teen People in its December-January issue, on newsstands Friday. "I respect knowledge of the psyche. I would be a therapist if I weren't an entertainer." Jessica, 25, posed for the cover of the magazine with her sister, Ashlee. Both talk about the difficult challenges of the past year.

Jessica, who had a starring role in The Dukes of Hazzard movie this summer, has been the queen of the tabloids this year — much of the coverage dissecting the marriage of the Newlyweds couple. The pair have denied persistent rumors of a split. "Hopefully mine and Nick's story will continue for the rest of our lives, like what we vowed, through sickness and in health."

Ashlee, 21, recently released her second album, I Am Me, and it debuted at the top of the charts. But she has still had to live down her embarrassing lip-synch disaster on Saturday Night Live last year. "Yeah I messed up in front of everybody," she says. (Last month, Ashlee revisited the scene of her musical flub, performing on SNL— really live, this time.) However, she adds: "I love to sing. It's a joy to me. I don't do it for anyone else — I do it for me."