Beyonce, Jay-Z Welcome Baby Girl

Beyonce and husband Jay-Z are now the proud parents of a bouncing baby girl!

The singer gave birth Saturday night in New York to a daughter named Blue Ivy Carter. The baby was delivered by C-section.

Celebrity well-wishers included Russell Simmons, who tweeted, "congrats to my good friends Beyonce and Jay-Z", and Rihanna, who also tweeted, "Welcome to the world princess Carter! Love Aunty Rih."