Kelly Clarkson is an artist that gives a lot to her audience. Her songs have, from the beginning, come from a deeply personal place. Kelly had a difficult upbringing that was painful from a young age, and often makes references to her childhood in many of her songs.
Kelly is a Texas native, born to Jeanne Ann and Stephen Michael Clarkson. She is the youngest of three. She has an older brother, Jason, and an older sister, Alyssa. Their parents went through an ugly divorce when Kelly was 6-years-old. Her sister went to live with an aunt and her brother lived with their dad for a while. This left Kelly home with her mom. From that point forward, Kelly’s relationship with her father became estranged.
As time went on, Jeanne Ann remarried, giving her five step-siblings. Stephen Michael also remarried, giving her another two step-siblings. Kelly never connected with her father. The two remain estranged. Kelly worked through the emotions of that situation in several songs across her discography. During a performance of one of those songs at her Los Angeles tour date, “Piece By Piece”, she dissolved into tears as her kids looked on in the audience.
Source : https://www.littlethings.com/kelly-clarkson-piece-by-piece/