Kelly Clarkson has officially finalized her controversial divorce with Brandon Blackstock, two years after announcing their split.The 39-year-old singer, who recently revealed she is changing her name to Kelly Brianne, agreed to a settlement with the 45-year-old music manager, following a series of difficult decisions during the divorce process.Los Angeles Superior Court Judge Scott Gordon detailed the terms of the agreement, including shared joint legal custody of their kids, 7-year-old River and 5-year-old Remington. Kelly has been granted primary custody in Los Angeles, while Blackstock will be with them one weekend a month.The TV host will pay Blackstock $45,600 per month in child support and an additional amount of $1.3 million.