'The most beautiful girl in the world': Beyoncé and Jay-Z welcome baby girl and name her Blue Ivy Carter

Superstar couple Beyoncé Knowles and Jay-Z have welcomed their first child - a baby girl named Blue Ivy Carter.

The 30-year-old singer's daughter arrived via scheduled caesarean section at Lenox Hill Hospital in New York City last night.

The couple's close friend Gwyneth Paltrow confirmed the baby's arrival on Twitter, writing: 'Welcome to the world Blue! We love you already.'

And the singer's younger sister Solange tweeted today: 'The most beautiful girl in the world.

According to the New York Daily News, Beyoncé checked into the Upper East Side hospital under the name Ingrid Jackson.

Beyonce Knowles, pictured in New York last month, has reportedly given birth to a baby girl called Blue Ivy Carter

Nick Cannon Has Surgery, Mariah Carey Tweets "Good Prognosis"

Nick Cannon is on the mend—and should be on his way home soon!

The America's Got Talent host, hospitalized earlier this week with kidney failure, underwent an apparently not-too-invasive procedure today and was doing well enough afterword to update fans on his condition himself.

"Just left the operating table and I was awake during the whole procedure. #OUCH," tweeted Cannon, who, as Mariah Carey's latest twitpic shows, is keeping his IV close but his gadgets closer.

HAPPY BIRTHDAY AND GOD BLESS YOU:

Ben Kinyaiya.