The American Idol alum feels "extremely confident" as she waits for the former flames' divorce to be finalized, said a source, who pointed out that their "relationship had been on the rocks for a long time" before their split last June.
According to the insider, music manager Blackstock couldn't handle his soon-to-be ex-wife's achievements and the big paychecks she was bringing home. “She was the high-income earner with a wildly successful talk show, and is the star of another hit show The Voice," the source told UsWeekly. "Brandon was extremely jealous of it and made her know it."
Since calling it quits, the soon-to-be single mama can now "finally enjoy her success without feeling ashamed," the source added. “Kelly doesn’t take credit for her success but shares it with the team she works with. It’s just who she is."
Clarkson, 39, and Blackstock, 44 — who tied the knot in 2013 — share 7-year-old daughter River and 5-year-old son Remington.
The "Since U Been Gone" songstress was granted primary custody of their children in November, and according to court documents obtained by OK! in July, the artist is responsible for 70% of her children's school tuition and related expenses.
In addition, Clarkson was ordered to shell out $150,000 per month in spousal support to her estranged hubby and pay $45,601 per month for the former couple’s two children. However, the mother-of-two has also been handed a few victories in the co-parents' ongoing divorce proceedings.
The judge ordered that Blackstock has to cover the mortgage on the former flames' home in Montana — given that he is the one using the abode as his primary residence. However, Clarkson can sell the property from under her ex since the judge recently ruled to uphold their prenup.
As OK! reported, the prenup separates all assets and income earned during their marriage, meaning Clarkson gets to keep what she earned. Blackstock was petitioning to nullify their prenup and split their assets, including the Montana ranch. He was also seeking a share of the income the "Stronger" singer earned.
However, a judge shot down his request, and since Clarkson paid for their Montana ranch, she reportedly has the right to sell it. Clarkson found out the exciting news while filming the new season of The Voice.
After receiving the email alerting her that the prenup had been upheld, she reportedly let out "a scream" and was joined by fellow judges Blake Shelton — who was managed by Blackstock before the "God's Country" crooner reportedly severed all ties — and newcomer Ariana Grande in celebrating her win.