Christina Aguilera Gives Birth to Baby Girl -- Summer Rain

It's her first child with fiance Matthew Rutler.

The singer and her fiance, Matthew Rutler, welcomed their first child together -- Summer Rain Rutler, ABC News has confirmed.

"So proud to welcome our beautiful daughter Summer Rain Rutler into the world," Aguilera wrote on Twitter.

Aguilera, 33, and Rutler announced earlier this year that they were engaged and expecting. In March, she revealed that they were going to have a baby girl.

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Christina Aguilera Is Pregnant

This is the second child for Aguilera, currently a judge on "The Voice." Her son, Max, from a previous marriage, is 6.