It was a busy weekend for expecting mom celebrities, as two of the biggest names in Hollywood gave birth within just one day of each other.

Nicole Richie and her rocker boyfriend Joel Madden are the parents of a daughter, the couple's rep at Handprint Entertainment told People. Harlow Winter Kate Madden was born Friday at Cedars-Sinai Medical Center and weighed 6 lbs. 7 oz. "The beautiful healthy baby girl left the hospital with her ecstatic parents," says the rep.

The next day, Christina Aguilera and Jordan Bratman welcomed a baby boy at 10:05 p.m., the first child for the 27-year-old singer and her music executive husband. "Christina and Jordan are proud to announce the birth of their son Max Liron Bratman. He is a beautiful, healthy baby boy!" a rep for the couple told People. "Mom is resting and doing well."

Congratulations to the happy couples!