Template loop detected: Template:Infobox Musical artist
Mosley was born in Arlington, Texas, to a single mother of six children. The family was poor, and when they did not make ends meet in one place, they had to move to another. Between moving and fights with her mother, what Lacey describes as "a war zone going on at home", she began dabbling in drugs at the age of 10.
Throughout her earlier years, she was an outspoken atheist, with a pronounced talent for singing. While attending high school in Gulfport, she was the lead singer for the band "Sofa Kingdom" which frequently played at WoJo's Coffee Shop in downtown Gulfport.
The fighting became so intense that she was forced to move in with her grandparents in Gulfport, Mississippi. After leaving her family and using drugs, Lacey experienced what she described as a "nervous breakdown", cutting off her hair and beginning to consider suicide. Her grandmother became distressed and urged Lacey to attend church. Eventually she became a Christian.
She received a pair of Grammy nominations at the 52nd Grammy Awards for her work with Third Day. "Born Again" was nominated for Best Gospel Song and Best Gospel Performance.
Mosley was married on September 6, 2008 to Joshua Sturm, the guitarist of the band Kairos and the guitar technician for Flyleaf.