Awwww, more exciting news from Christina Aguilera. The singer, who gave birth to a baby girl on Saturday (Aug. 16), has officially released her daughter's name.

Early this morning (Aug. 18), the mother of two tweeted:

Christina did not reveal the inspiration behind Summer's name, her weight or any other details about the birth. This is her first child with fiance Matt Rutler. The two became engaged on Valentine's Day and less than a week later, news broke that the couple were expecting a baby. In March, Christina revealed that she was pregnant with a baby girl.

The Grammy-winning singer already has a son, 6-year-old Max, with her ex-husband Jordan Bratman. The two were married for five years and split in 2010.

In case Christina won't be busy enough with two kids, she's also working on new music! Back in April, she tweeted about "creating" music, and has since shared photos of herself in the recording studio. However, the singer opted not to appear on this upcoming season of 'The Voice,' with No Doubt's Gwen Stefani filling in for her.

Bare-Faced and Beautiful! See Christina Aguilera and More Stars Without Makeup!