Is Mariah Carey pregnant with twins?

Pregnant star Mariah Carey referred to her unborn child as 'they' in an upcoming interview with Radio Disney, sparking rumours that she and husband Nick Cannon are expecting twins.

While discussing her new album Merry Christmas II You, the 40-year-old singer revealed she began recording the album after finding out she was pregnant, reports the Daily Mail.

"I just hope that they don''t turn out hating Christmas!" she joked to Radio Disney''s Ernie in a radio interview to be aired on Tuesday.

Carey, who has not revealed her due date, kept her bump well hidden during a performance at New York''s Rockefeller Centre.