"True Jackson, VP," Premieres Tonight Starring Keke Palmer

If Nickelodeon guesses right, 'True Jackson' star "True Jackson, VP," Premieres will follow in the popular footsteps of Miley Cyrus, Miranda Cosgrove, and other tween stars.True Jackson has quite a bit in common with her fellow sitcom characters on Nickelodeon and the Disney Channel. She’s a good girl — not a rebel — with adult-sized ambitions and a streak of adorable klutziness. She has a multiracial mix of goofy best friends. And she’s likely to appear on a product near you.

That about sums up the formula of tween TV, and of Nickelodeon's newest entry into the sitcom market. "True Jackson, V.P.," which premieres tonight at 9:30, features "Akeelah and the Bee" star Keke Palmer as a 15-year-old fashion designer, named vice president of a major fashion house. And Nickelodeon hopes it will make Palmer the latest in a line of mostly wholesome, multiplatform teenage stars.

The kids who might love True are the 8-to-12-year-old girls who made "Hannah Montana" a nationwide phenomenon, and whose spending powers have made them a coveted demographic. In recent years, the Disney Channel has unleashed a string of sitcoms designed for them, from the onetime hit "That's So Raven" to the current show "Wizards of Waverly Place." Nickelodeon has offered such competitors as "Zoey 101" - which was canceled after star Jamie-Lynn Spears got pregnant at 17 - and the current hit "iCarly."

Each has a multicamera format, a loud laugh track, a penchant for slapstick, and a lead character who projects a certain sort of purity. (The zapping of Spears was little surprise, and some believe Miley Cyrus's provocative Vanity Fair portraits herald her impending exit from the tween-idol scene.) Shows aimed at teenagers, such as the CW's "Gossip Girl" and "90210," are loaded with provocative behavior. But on tween TV, high school is a safe and pure place, and stars are aware of their role-model status. Both "Waverly Place" star Selena Gomez and up-and-comer Demi Lovato - the star of last summer's Disney Channel movie "Camp Rock," who is now filming a Disney sitcom of her own - wear "promise rings" declaring that they'll wait until marriage for sex.Palmer, 15, who is involved with the teen mentoring program "It's Cool to Be Smart," seems equally willing to embrace the good-girl image.