Barbara Walters has snagged Mariah Carey for the singer's first interview since her two-week hospital stay for a physical and emotional breakdown, a spokesman for ABC has announced. The interview for the "20/20" news program, which will be pre-taped, is scheduled to air on Sept. 12. The network representative said that the pop diva, 31, whose new album "Glitter" is due to hit stores the day before the interview airs (Carey's movie, "Glitter," will be released on Sept. 21), will "obviously discuss the reasons behind her hospitalization," among other topics. Carey has been slowly inching her way back into the public eye. Earlier this week it was reported that she briefly visited 150 disadvantaged New York City kids at her Camp Mariah. Meanwhile, Variety columnist Army Archerd on Thursday had some less-than-flattering quotes about Carey's behavior on the set of her second movie, "Wise Girls." The film's producer, Jack Sojka, told Archerd that there were several times when Carey showed up late for work -- once without giving any notice. "When she arrived on the set three hours late," said Sojka, "she claimed she had hives and had to go to the doctor. Behind her back the company called her 'the bitch' and 'the diva.' The crew didn't mind the delays: They got overtime because of her."