While the band's then frontwoman Lacey Sturm prominently sings, her unclean vocals are frequent throughout the album. Lyrically, the album deals with topics such as Christianity, love and death. "Flyleaf" received mixed reviews from music critics. It debuted at No. 88 on the "Billboard" 200, selling more than 13,000 copies within its first week. Due to the band's growing exposure to fame in 2007, it eventually reached its peak of No. 57 on the week of September 17, 2007, and spent more than 133 weeks on the chart. It also topped the "Billboard" Christian Albums chart, and has since become the ninth best-selling Christian album of the 2000s. It has sold more than 1 million copies to date, and was certified Platinum by the Recording Industry Association of America (RIAA).