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Mariah Carey celebrated her birthday with a trip to the hospital.

Carey, who's pregnant with twins, was hospitalized late Saturday after having contractions, but she was released the next day.

"So #dembabies really wanted 2 celebrate w/us/share the anniversary! I started having contractions last night..went 2 the hospital," Carey Tweeted on Sunday.

Mariah Carey reveals genders of twins

In December, Carey's husband Nick Cannon announced that the couple was expecting twins —a boy and a girl. Carey is due next month.

"They almost came on 3/27- happy anniversary indeed!!!" Carey added. "We have a few more weeks 2 go but- wow!!!: ) #soreadyallready!"

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