Beyonce and Jay Z have finally welcomed their first child together, with the Single Ladies singer giving birth to a daughter via scheduled C-section in New York on Saturday night (January 6, 2012). The name of the baby has been hotly debated for weeks, though according to E! Online, the superstar couple have opted for Ivy Blue Carter.

The couple, who tied the knot in April 2008 after six years of dating, caused online hysteria last year when Beyonce revealed she was pregnant onstage at the MTV Video Music Awards. News of the impending birth spread on Twitter at a rate of 8,686 tweets per second – a new record for the social media service. Friends of the couple have already begun sending their messages of congratulations, with music mogul Russell Simmons tweeting, “congrats to my good friends Beyonce and Jay-Z”. Barbadian R&B queen Rihanna said, “Welcome to the world princess Carter! Love Aunty Rih”. During an interview with the Punch Bowl Blog this weekend, Beyonce’s former DESTINY’S CHILD band-mate Michelle Williams said Ivy Blue Carter would certainly make something of herself, saying, “They're going to be the coolest parents in the world. I'm sure that child will be spoiled rotten but it better have some talent. I think it's going to be a gifted, gifted kid”.

According to early reports, a healthy Ivy Blue was born at New York’s St Luke’s Roosevelt Hospital late on Saturday, though it is not clear when the new family will leave the facility.