Pregnancy rumors have swirled around pop star Mariah Carey ever since her 2008 marriage to 29-year-old actor Nick Cannon. Up until now, those rumors have been just that — rumors. But Carey’s recent behavior has added fuel to the fire. On Tuesday, she pulled out of the movie For Colored Girls Who Have Considered Suicide When the Rainbow Is Enuf, based on the 1975 play of the same name by Ntozake Shange. Filming for the movie, which had a tentative release date of Janary 2011, was set to begin next month. Neither Carey or Cannon have commented on the move, although a rep for Carey told UsMagazine.com that Carey pulled out of the movie per her doctor’s instructions.