Is fame a blessing or a curse? In the brazenly unrealistic world of the Disney ‘tween comedies, celebrity comes as easily as water from a tap. Just look at “Hannah Montana,” airing in a six-hour marathon on Disney beginning at 1 p.m. She navigates the halls of junior high and the corridors of superstardom with equally glib aplomb.

So it’s a welcome if slightly jarring surprise to see the 2006 made-for-TV comedy “Read it and Weep” (7 p.m., Disney) treat overnight success and media attention as a slowly gathering nightmare.

Kay Panabaker (“Summerland”) stars as Jamie, a thoroughly normal girl with slightly nerdy friends who feel out of sorts in the cheerleader-driven pecking order of their high school. Jamie keeps a secret diary about her alter ego, a cool teen named Isabel, or “Is” (Danielle Panabaker, Kay’s real-life older sister), who uses superpowers to triumph in love and achieve popularity.

Jamie mistakenly e-mails her secret diary as a homework essay to her English teacher, who is impressed by her assured writing style. To Jamie’s horror, her allegorical fantasy becomes a prize essay, a published book and a best-seller in short order. She’s suddenly catapulted into a world of publicists and handlers, talk shows and stylists.

As Jamie flounders in this new realm, her alter ego, Is, takes a more prominent role in her waking life, talking to her and even demanding that she take certain actions to further her celebrity. Or is it Isabel’s celebrity?

This being a Disney production, lessons will be learned, the good rewarded and the vain punished by movie’s end. But any kids’ comedy that intimates, if ever so slightly, that the quest for fame and popularity may be linked to madness deserves our attention.

Tonight’s other highlights

¢ “Greatest Moments: Reba McEntire” (7 p.m., CMT) recalls the popular singer’s videos, her Broadway success, eponymous sitcom and various charities.

¢ On two episodes of “24” (Fox), Homeland Security takes over (7 p.m.), a foreign agent leads Jack to Bierko (8 p.m.). Due to lack of viewer interest, this marks the final broadcast of “24” repeats on Friday nights. Fox will air movies instead, beginning next week.

¢ Author Richard Rodriguez and scientist John Houghton discuss spirituality on “Bill Moyers on Faith & Reason” (8 p.m., PBS, check local listings).

¢ Therapist Dr. Laura Berman helps couples deal with questions of intimacy on the new advice series “Sexual Healing” (9 p.m., Showtime).