Aguilera reportedly gave birth via C-section at Cedars-Sinai Medical Center in Los Angeles. The couple hasn’t yet announced the name of their new baby daughter.
Earlier in the week, Aguilera posted a photo of herself on Instagram with the caption, "Baby girl getting first listen to what mama's been creating in the studio." The singer's most recent studio album was Lotus in 2012.
News that Aguilera was pregnant with her second child arrived shortly after the singer announced her engagement to Rutler on Valetine’s Day of this year. The two met on the set of Aguilera's 2010 film Burlesque, where Rutler worked as a production assistant.
Aguilera also has a 6-year-old son, Max, from her first marriage to music executive Jordan Bratman.