Defining Kevin Federline as a celebrity is a big stretch. He hasn't done anything noteworthy in Hollywood or in any other entertainment area, but a majority of people know his name. The only thing he is known for is that he was married to Britney Spears. The relationship began while Kevin was involved with his ex and was a dancer for Britney's concerts. They were engaged quickly and had a widely publicized wedding that seemed to accurately reflect their relationship.
During their marriage, Britney and Kevin had two sons together. Shortly after the arrival of their second son, their relationship began to crumble. They tried to make it work, but eventually their differences got the best of their relationship. They divorced and both got involved in other relationships. They were an odd couple, but they seemed to work well together for awhile.