Christina Aguilera tweets daughter's name

Singer Christina Aguilera has revealed the name of her baby girl on Twitter.

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

Summer Rain was born on Saturday in Los Angeles. She is Aguilera's second child but her first with fiance Matthew Rutler, a film producer.

Aguilera and ex-husband Jordan Bratman have a six-year-old son, Max Liron.