Britney and Kevin started out with joint custody of their sons, Sean (left) and Jayden, when they divorced in November 2006. But in October 2007, a judge gave Kevin full custody of the boys. The reason? Britney's erratic behavior and drug and alcohol use, which Kevin said was harmful to their children's welfare. The following July, Britney gave Kevin sole legal and physical custody of the boys, accepting monitored visitation with her sons two days a week and one overnight. Nowadays, Britney has a joint-custody agreement with Kevin, but legally, Kevin is the boys' guardian.