Singer Beyonce and husband Jay Z welcomed a baby girl and have already named her Blue Ivy Carter. She is the first child to the celebrity couple.

The 30-year-old singer delivered her daughter by c-section last night at Lenox Hill hospital, reports The Daily Mail. The new mommy has already been getting wishes from celebrities on twitter. Among the wishers, Russell Simmons and Rihanna were the first ones. Rihanna tweeted, "Welcome to the world princess Carter! Love Aunty Rih."

Russell posted, "congrats to my good friends Beyonce and Jay-Z."

According to The Daily Mail, Beyonce checked into the upper East Side hospital with a different name, Ingrid Jackson. She was spotted with her mother on Thursday night. It is reported that she booked the entire fourth floor for $ 1.3million.