Celine Dion
Julia Roberts
Diana Krall and husband Elvis Costello
Marcia Cross and her husband Tom Mahoney
Patrick Dempsey, his wife Jillian
Jennifer Lopez and Marc Anthony
Angelina Jolie and Brad Pitt
Lisa Marie and her husband, Michael Lockwood
Charlie Sheen and Brooke Mueller
Rebecca Romijn and Jerry O’Connell

And due any day... *Princess Mary and Prince Fred
That's really not very many huh? Given some are a few years old now too.

Also for the list:
Sarah Jessica Parker & Matthew Broderick