Mariah CareyMariah Carey abruptly dropped out of Tyler Perry's new film earlier this week, setting off a firestorm of speculation that the singer is pregnant. But is she? "She is not doing the movie because her doctor advised her not to," her rep told Us Magazine. "More than that I cannot comment further."

Carey was set to appear in the adaptation of Ntozake Shange's 1975 play 'For Colored Girls Who Have Considered Suicide When the Rainbow Is Enuf,' which was set to start filming next month.

Several weeks ago, Carey denied rumors that she was expecting her first child with husband Nick Cannon after photos of the singer prompted speculation. But this time around, the 41-year-old superstar hasn't confirmed or denied the rumors.