Celine Dion Twins -- Gives Birth to Twins

Celine Dion gave birth to twin boys today ... a rep for the singer tells TMZ.

We're told she gave birth at 11:11 AM -- and then again at 11:12 AM -- at St. Mary's Medical Center in West Palm Beach, FL.

One boy was 5 pounds, 4 ounces -- the other was 5 pounds, 10 ounces. We're told they are “100% healthy but will be in an incubator for a few days.”