Kelly Clarkson is reportedly happy and has no regrets about ending her marriage to Brandon Blackstock. The singer, 41, filed for divorce from Brandon – with whom she has daughter River Rose, nine, and son Remington Alexander, seven – in June 2020 after seven years of marriage, and even though they finally settled their split in March 2022 after two years of court battles they have since been locked in more bitter legal disputes. But a source told People about how ‘The Kelly Clarkson Show’ host is still managing to stay upbeat: “She is doing really well. She is happy that she left LA for New Yo…