Kelly Clarkson admits that co-parenting with her estranged husband, Brandon Blackstock, is «tough.»The «Since You've Been Gone» singer is in the middle of her divorce with her ex, whom she shares daughter River Rose, 6, and son Remington Alexander, 4. During an episode of, Clarkson shared some insight on how the two navigate co-parenting.«You speak about co-parenting, and I'm doing that right now too,» she told guest Khloe Kardashian, who shares daughter True, 2, with Tristan Thompson.