Article continues below advertisementBrandon Blackstock moving on with Kelly Clarkson's former assistant was the cherry on top of heartbreak the "Stronger" singer felt after filing for divorce from the talent manager in 2020.After an obituary for Blackstock revealed earlier this week that the late music executive had a "loving partner" in a woman named Brittney Marie Jones - who was once employed by Clarkson before working for the "Because Of You" hitmaker's ex-husband - a source spoke out about the country star's alleged feelings on the matter.