Christina and her fiancé Matthew Rutter officially announced that they are expecting a baby together with a cute picture.
In the snap, film producer Matthew is gently cradling Christina's growing baby bump and they are both smiling.
Alongside the photograph, which Christina posted on Twitter, she said: "Baby loves NYC."
Rumours of a pregnancy first began swirling in February and, according to reports, Christina announced at a Malaysian concert in March that she was expecting.
But until now, there had been no official word from the couple and Christina - who has a son called Max from her previous marriage - has been particularly coy while in New York this week.
Yesterday, Christina was snapped out and about in the Big Apple and covered her bump with a black T-shirt and leggings.
More pictures of Christina emerged today also, and she was quick to pull her top down over her growing pregnancy tummy.
Now it is official, she can let it all hang out. Hooray!
Celebrities who have announced pregnancies in 2014:
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