Pop singer Mariah Carey says her marriage to Sony Music chief Tommy Mattola prevented her from taking movie roles, New York's Daily News reports. The newspaper says Carey told Barbara Walters on ABC's "20/20" (airing tonight) that she would have said yes to a number of roles if she had known about the offers. "I was not told about them," Carey complains. "I would read things like in Variety or Us or whatever magazine."