"I refuse to be bullied and I just have to clear up his memory lapses and misinformation," American Idol's first winner said on her WhoSay account Tuesday. "It feels like a violation."
In the book, Davis said he had a meeting with Clarkson in which "Kelly burst into hysterical sobbing" because her eventual hit Since U Been Gone would be put in her 2004 album, Breakaway.
The Grammy-winning songstress countered that Davis' story was "not true at all" and that "his stories and songs are mixed up.
"I couldn't be more proud of that song," she wrote. "I resent him dampening that song in any way."
She said she cried after Davis bullied her about her abilities as a songwriter after listening to a track called Because of You.
"He hated it and told me verbatim that I was a 'sh*tty writer who should be grateful for the gifts that he bestows upon me.'"
She wrapped up saying, "I love my job. I love my music. I love my fans," and that "growing up is awesome because you learn you don't have to cower to anyone -- even Clive Davis."
Davis later issued a statement through his rep saying, "I am truly very sorry that she has decided to take issue with what I know to be an accurate depiction of our time together.
"Before the book was published, I had every fact checked with five independent individuals who were present on a daily basis throughout it all.
"The chapter as it is written was thoroughly verified by each and every one of them. I stand by the chapter as written in my book. At the same time I wish, and will always wish, Kelly's talent and her career to soar to ever new heights."
In his tome, Davis, who's currently the chief creative officer for Sony Music Entertainment, also reveals his bisexuality, as he said he was involved in a 13-year relationship with a doctor, and a 7-year relationship with another man. (He did not name them so as to protect their privacy.)