The release of Kelly Clarkson's album My December was delayed

Arguments over material on her new album My December were thought to have caused the Grammy-winning vocalist to have fallen out with the BMG chairman.

On her website, she called Davis an "important force" in her success.

"I really regret how this has turned out and I apologise to those whom I have done disservice," she said.

Darker sound

"I want my band, my advisors, those close to me and my record label to be one big, tightly-knit family," Clarkson wrote.

"Like any family we will disagree and argue sometimes but, in the end, it's respect and admiration that will keep us together."

Davis, who is credited with launching the careers of stars like Whitney Houston and Alicia Keys, "has also given me respect by releasing my new album when he was not obligated to do so", Clarkson added.

My December was originally due out in April but was delayed until 26 June. It made its debut at number two in the US chart.

In the last series of American Idol the former winners sang together

It was reported that Davis was not happy with the darker, rockier sound of Clarkson's new material and had suggested she release more commercial songs.

Despite being offered a cash bonus if she agreed, Clarkson went ahead and released the album the way she wanted.

Before its release, she fired her long-time manager and pulled a summer tour because of poor ticket sales.

"I would never intentionally hurt anyone," her message said. "I love music, and I love the people I am blessed to work with."