Guess what Christina Aguilera named her newborn daughter?

Los Angeles - Christina Aguilera has given birth to a baby girl and gave her a very unique name.

The 33-year-old singer welcomed her first child with fiancé Matt Rutler via Caesarean-section at Cedars-Sinai Medical Center in Los Angeles on Saturday, according to UsMagazine.com.

The Your Body hitmaker also delivered her six-year-old son Max - whom she has with ex-husband Jordan Bratman - via C-section and was keen to give birth to her daughter naturally this time around.

A source said earlier this week: "She's due at any moment. But she's freaking out because with her first child, Max, she had a C-section. This time, though, she wants to have a natural childbirth."

The Voice USA mentor took to Twitter to share the news of the birth of Summer Rain Rutler.

So proud to welcome our beautiful daughter Summer Rain Rutler into the world.

— Christina Aguilera (@xtina) August 18, 2014