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Mariah Carey and Nick Cannon are celebrating the birth of their twins ... and their four year anniversary at the same time!

The couple renewed their vows at the hospital with an intimate ceremony conducted by Reverend Al Sharpton

Nick Cannon tweeted:

    "We just had a wedding in the hospital!"


Sharpton, who was able to catch a glimpse of the babies, tweeted:

    "Mariah looks great, and the babies are beautiful. I am so moved by the sincere spiritual commitment of Mariah and Nick. They have not let success separate them from God. I am so proud."


Find out details about their newborn twins ... after the jump.