Dolly married Carl Dean on May 30, 1966, so she has been married for 43 years. http://www.youtube.com/watch?v=ZnOU89u58L8
Beyonce and Jay Z have been married since April 4, 2008
he's been married for a few years now, not sure how long
On June 12, 2009, Jon & Kate Gosselin will have been married for 10 (ten) years. I hope they are able to celebrate it together in as a joyous occasion.
25 years this past Sempember.