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​Christina Aguilera and Matt Rutler welcome baby girl

Christina Aguilera is a mom for the second time.

Aguilera, 33, and fiance Matt Rutler, 28, welcomed a baby girl on Saturday. The pop singer announced the news via Twitter, along with the newborn's name: "So proud to welcome our beautiful daughter Summer Rain Rutler into the world."

News of Aguilera's pregnancy and engagement surfaced in February. At the time, Aguilera also showed off a photo of her sparkly engagement ring. This is her second child. She already has a six-year-old son, Max, with her first husband, Jordan Bratman. The new edition marks Rutler's first child.

Rutler and Aguilera met in 2010 on the set of "Burlesque," where Rutler had been working as a production assistant.

Aguilera provided updates on her pregnancy leading up to the birth -- even from the studio: