Stop The Presses! (NEW)

Beyonce Welcomes Baby Girl Blue Ivy Carter!

Stop The Presses!

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Jay-Z, Beyonce, Us Weekly

2012 is off to a wonderful start for Beyonce and Jay-Z!

The singer, 30, gave birth to a baby girl in New York on Saturday, according to various outlets, including Good Morning America and her hometown paper, the Houston Chronicle, which reported that "baby and mom are doing just fine."  GMA reports the superstar gave birth via C-section.

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"Welcome to the world, Blue," Beyonce and Jay-Z's close friend Gwyneth Paltrow tweeted Sunday. "We love you already.

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The actress also answered a "confused" fan who asked if the infant's name is "Ivy Blue or Blue Ivy," saying, "It's Blue Ivy!'

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According to GMA, the couple chose "Ivy" because of the significance of the number "4" or "IV," --  Beyonce and Jay-Z were born on Sept. 4 and Dec. 4, respectively, were married on April 4, 2008, and Beyonce's latest album is entitled 4.)

It's the first child for the "Love on Top" singer and hip-hop mogul Jay-Z (real name: Shawn Carter), 42.

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An observer at NYC's Lenox Hill Hospital told Us Weekly that Jay-Z was spotted walking the hospital halls Saturday morning looking "happy." Beyonce's family members -- sister Solange, parents Tina and Mathew Knowles -- were also spotted at the facility with "flowers with pink balloons and silver and black ribbons," the witness added.

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Confirming the big news? None other than superstar pal Rihanna, who tweeted Saturday, "Welcome to the world princess Carter! Love Aunty Rih."

Fellow hip hop icon Russell Simmons also wrote: "Congrats to my good friends Beyonce and Jay-Z."

The 30-year-old singer first announced she and her hubby, 42, were expecting at MTV's Video Music Awards in August. During her incredible "Love on Top" performance, she exclaimed, "Feel the love that's growing inside of me," before ripping open her purple sequined blazer to reveal her baby bump.

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Beyonce was spotted as recently as Thursday night in NYC, covering up her growing baby bump with a colorful scarf.

Although rumors spread at the beginning of the month that she had already given birth, a source told Us Beyonce and the Roc Nation mogul actually spent New Year's Eve dining on fried chicken and oysters at Brooklyn restaurant Buttermilk Channel.

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Tell Us: What do you think of the name Ivy Blue?

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