WOW 1999 is a compilation album of 30 contemporary Christian music hits that was released on October 20, 1998. It also featured three bonus tracks from new artists. WOW 1999 peaked at the 51st position on the Billboard 200 chart in 1998, and 2nd place on the Top Contemporary Christian album chart. In 2000 it reached No. 21 on the Top Contemporary Christian chart. The album was certified as double platinum in the year 2000 by the Recording Industry Association of America (RIAA).
It was certified as gold in Canada in 1999 by the Canadian Recording Industry Association.