Some people (minority) say it's 75year, most say it's 60 years. In traditional anniversary gifts diamonds are given after 60 years. But in the modern version, it's 30.
She was married to her first husband, Tommy Mottola from 1993 to 1998, and she has been married to Nick Cannon since April 30th, 2008.
She was married to Deryck Whibley on June 15th 2006
Tom hanks and Rita wilson have been married for 24 years
Michael Howard, former leader of the British Conservative Party, married his wife, Sandra, in 1975. He is her fourth husband.