Mariah Carey and Nick Cannon are the proud parents of twins. The pop diva went into labor on Saturday at 12:07 p.m. EST at an undisclosed Los Angeles hospital, Mariah’s publicist Cindi Berger confirmed to The Associated Press.

The baby girl was born first, weighing 5 pounds, 3 ounces, and was 18 inches long, with her brother following at 5 pounds 6 ounces, and was 19 inches.

The couple has not disclosed the babies’ names yet. Nick drove his wife to the hospital in their Rolls-Royce Phantom, added Berger. Mariah, 41, thought she was experiencing false labor pains, but remained calm.

Nick, 30, was so nervous that he went to the wrong department at the hospital, and was led to the maternity ward by a nurse. They were reportedly listening to Mariah’s hit single “We Belong Together” after the children were born.

“My wife just gave me the most incredible anniversary gift ever in life! I won’t ever be able to top this!” tweeted the new dad following his children’s birth.

Mariah and Nick are expected to celebrate their third anniversary by renewing their wedding vows on Sunday. The singer announced her pregnancy last fall after previously suffering a miscarriage.