Christina Aguilera has given birth to a healthy baby girl! The 33 year-old songstress and her fiancé Matthew Rutler welcomed the newborn baby, and her second child, into the world on Saturday (Aug 16th) in Los Angeles.

Christina Aguilera
This newborn baby is Aguilera and Rutler's first child together

Aguilera is already a mother to a 6 year-old son, Max Liron, from her previous marriage to Jordan Bratman, but this is Rutler's first child.

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And it already seems Max is ready for the big brother role, last month Aguilera tweeted a rather cute photograph of her son with his arm across the stomach of his mom. "Max already protecting mommy & his little sister!" she tweeted. "He's the greatest #maxthegreat."

The part time 'The Voice' coach announced her pregnancy news back in February, just a week after she confirmed Rutler, who she has been dating for the past three years, proposed to her.

Earlier this summer Aguilera showed how truly sexy pregnant woman can be as she bared all in several stunning snaps for V Magazine. "As a woman, I'm proud to embrace my body through all stages of life, staying fearless and confident in surrendering to the unknowns the future has in store," she said at the time.

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Hopefully the 'Dirty' singer's first born won't become jealous of the new arrival, back in April 2011 Christina gushed to Parade magazine about Max always wanting his mother to himself.

Chrisitina Aguilera
Aguilera is already a mother to a 6 year-old son, Max

"He doesn't really like to see mommy in work mode quite yet," she said. "He's so used to when he sees mommy, I'm in mommy mode, and mommy mode is all about Max. So as he grows up, he'll understand that side of mommy as a good example of being positive and driven and focused. But for now, he definitely wants mommy all to himself!"

Congratulations to the happy couple!