More Boobygate fallout, folks: Janet Jackson has backed out of her starring role in ABC's upcoming biopic about Lena Horne after she says Horne effectively disinvited her from the project. According to Variety, Horne — incensed by Jackson's Super Bowl peep show — asked ABC to drop the "Nasty" girl. Although the network refused, Jackson decided to pull out anyway. Producers Craig Zadan and Neil Meron (Chicago) also quit in solidarity with the singer-actress-stripper — leaving the movie in limbo. And there's apparently no truth to the rumor that Janet's brother Michael may step into the title role.