Mariah Carey [1] and Nick Cannon [2] celebrated their fourth anniversary with another milestone -- becoming parents to a baby girl and boy.

Carey's representative, Cindi Berger, confirmed the births to The Associated Press. The singing superstar gave birth Saturday (Apr. 30) at 12:07 p.m. EDT at an undisclosed hospital in Los Angeles. Berger says the baby girl was born first, weighing 5 pounds, 3 ounces, and was 18 inches long; her brother was next, at 5 pounds 6 ounces, and was 19 inches.

Mariah Carey Bares Pregnant Belly for Life & Style: Photo [3]

Berger says the couple has not named the children yet. Cannon drove Carey to the hospital in their Rolls-Royce Phantom. Berger said the 41-year-old Carey, who had gone through false labor, was calm, thinking that it was another false alarm.

Meanwhile, the 30-year-old Cannon was so nervous he went to the wrong department at the hospital, and was guided to the maternity ward by a nurse.

"It was like right out of an 'I Love Lucy' skit," said Berger.

Berger says they were listening to Carey's "We Belong Together" after the children were born.

Mariah Carey Having a Boy and Girl [4]

The couple are expected to renew their wedding vows on Sunday. The pair got married in 2007 after a whirlwind romance. They were the subject of endless baby rumors, and the couple actually were expecting shortly after their marriage, but Carey had a miscarriage; they did not reveal the miscarriage until she announced her pregnancy last fall.

The couple plan to live a bi-coastal life, and have luxurious nurseries in both New York and Los Angeles.

As far as more children, Carey recently declared she's done.

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