The station at 95.9 FM in Orange County, California has its origins in KEZY, which first signed on in 1959, at 1190 AM from its studios at the Disneyland Hotel in Anaheim with a 1,000-watt signal.

[2] In the late 1960s, KEZY moved its studios and offices off the Disneyland campus to a larger complex located (coincidentally) at 1190 East Ball Road in Anaheim.

Air staff during this time included John Fox (previously at KFMB-FM in San Diego), Liz Pennington, April Whitney, Carolyn Hogenred, and music director Scott Free.

[5] Then in October, Clear Channel Communications, then the largest U.S. radio broadcasting group, purchased Jacor in a $4.4 billion deal.

KFSH's city of license, however, remained Anaheim until November 2008, when it was changed to La Mirada, approximately five to six miles northwest, near the Los Angeles—Orange county line.

KFSH-FM dropped the show on April 16, 2020 and replaced it with Keep the Faith with Penny, originating from sister station WFSH-FM in Atlanta.

However, the station's 6,000-watt signal can be heard clearly only in Orange County, its primary service area for most of its history, and south of Downtown Los Angeles.

Generally, the stereo signal is unable to be received in northern Los Angeles County, including the San Fernando Valley.

[13] This is due to interference from KCAQ, a Class B1 station in Camarillo that operates on the same frequency and to which KAIA is short spaced.