Kelly Clarkson and Brandon Blackstock divorced mainly due to "irreconcilable differences," a term cited in their 2020 divorce filing. The marriage faced challenges such as blurred lines between personal and professional lives since Brandon was also her manager, which created tension. Additionally, during the COVID-19 pandemic lockdown, the couple's existing problems became more pronounced as they spent extended time together in isolation. Kelly described feeling very limited and unhappy in the marriage, indicating that their paths and communication were not aligned. Their divorce proceedings were complicated by legal battles over spousal support, custody of their two children, and disputes regarding property and financial matters. Despite being a good father, Kelly revealed that Brandon was not a supportive or good husband in the relationship context. Later developments from 2025 reports included Brandon's illness and death from cancer, during which Kelly delayed commitments to support their children. It was also revealed that Brandon had a relationship with Kelly's former personal assistant during his final years, which added emotional distress for Kelly. In summary, the divorce was caused by a combination of personal incompatibility, professional conflicts, trust issues, and legal and financial disputes, culminating in their split after nearly seven years of marriage.