Kimberley placed 3rd in the second season of American Idol, behind Ruben Studdard and Clay Aiken. Shortly after the show, Kim signed a recording contract with Curb Records and released her debut album, "One Love", which debuted in the Billboard top 20 and included the hit singles "8th World Wonder", "Wrong", and "I Could". Her sophomore album, "Based On A True Story" was released in the Spring of 2007 which spawned the #1 Billboard dance hits "Change" and "Band of Gold". She later broke a few more Billboard records with her holiday singles "Up On The Housetop" and "Jingle Bells", which led to the full holiday album, "Christmas" in late 2007.
Kimberley has also become a popular plus-size model, signing a contract with Ford Modeling Agency. She has been a celebrity spokesperson for Lane Bryant, Seven7 jeans, and Jenny Craig.
In 2010, Kimberley returned to music being the first artist signed to Randy Jackson's new dance label Dream Merchant 21.