Question: All the songs and artists on the WOW Hits 2004 were known for what type of music?

Context paragraphs:
Sidewalk Prophets: Sidewalk Prophets is a contemporary Christian music band from Nashville, Tennessee.  Their album "These Simple Truths" contained the single "The Words I Would Say", which is also featured on "WOW Hits 2010" and "WOW Hits 2011".  The group has won the 2010 GMA Dove Award for New Artist of the Year.

WOW Hits 2006: WOW Hits 2006 is a two-disc compilation album of songs that have been touted to represent the best of Christian music of 2005.  It was released on October 4, 2005.  It includes thirty songs plus three bonus cuts.  The album features songs by Jeremy Camp, Casting Crowns, MercyMe, Third Day, and many more well known groups and singers.  The album peaked at No. 42 on the Billboard 200 chart.  It was certified as platinum in sales in 2006 by the Recording Industry Association of America (RIAA).

Amy Grant: Amy Lee Grant (born November 25, 1960) is an American singer, songwriter, musician, author and media personality.  She is known for performing contemporary Christian music (CCM) and for a successful crossover to pop music in the 1980s and 1990s.  She has been referred to as "The Queen of Christian Pop".

WOW 1996: WOW 1996 is a compilation album of thirty contemporary Christian music that was released on November 7, 1995.  This represented the first installment in a highly successful annual series named WOW Hits.  The album peaked at No. 144 on the "Billboard" 200 chart in 1995.  It also landed in seventh place on Billboard's Top Contemporary Christian album chart that year, and reached second place in 1996.  The album was certified as platinum in the year 1997 by the Recording Industry Association of America (RIAA).

WOW Hits 2004: WOW Hits 2004 is a two-disc compilation album of songs that have been dubbed to showcase the best in contemporary Christian music.  It was released on October 7, 2003.  The album features songs by Michael W. Smith, Newsboys, Amy Grant, Sixpence None the Richer, and many more widely renowned groups and singers.  It peaked at No. 51 on the "Billboard" 200.  The album was certified as platinum in the US in 2004 by the Recording Industry Association of America (RIAA).

God Will Lift Up Your Head: "God Will Lift Up Your Head" is a song recorded and performed by Jars of Clay.  The song is a remake of a traditional hymn of the same name that was written by the 17th-century German hymnwriter Paul Gerhardt.  Jars of Clay wrote the music and altered the translated lyrics (of John Wesley) slightly for the version that appears on "Redemption Songs".  The song is the first of two radio singles in promotion of the album which hit number one on the Christian CHR radio charts in 2005.  It also appears on the "WOW Hits 2006" compilation album, and the greatest hits album "Jars of Clay: Greatest Hits".

WOW Hits 2005: WOW Hits 2005 is a two-disc compilation album of hit songs that were selected to represent the best in contemporary Christian music.  It was released on October 5, 2004.  The album includes thirty one songs plus three bonus tracks.  It features songs by Steven Curtis Chapman, Newsboys, MercyMe, Jars of Clay, and many more high-profile groups and singers.  The album peaked at No. 29 on the Billboard 200 chart.  It was certified as platinum in the US in 2005 by the Recording Industry Association of America (RIAA).  The album was certified as gold in Canada in 2006 by the Canadian Recording Industry Association (CRIA).

WOW Hits 1: WOW Hits 1 was intended to be the first of three single-CD WOW Hits albums to be released in 2008.  It contains sixteen of the most recent hit songs on Christian radio plus three bonus tracks.  The album reached No. 4 on "Billboard"'s Top Christian Albums chart in 2008, and No. 99 on the "Billboard" 200 that same year.

These Simple Truths: These Simple Truths is the Sidewalk Prophets first major-label studio album with Word Records, released on August 25, 2009.  It features the hit radio singles "The Words I Would Say" and "You Love Me Anyway."  The main genre the Sidewalk Prophets play in is Contemporary Christian music.  The first hit from this CD, "The Words I Would Say" which is also featured on WOW Hits 2010 and WOW Hits 2011.

WOW Hits 2012: WOW Hits 2012 is a two-disc compilation album composed of some of the biggest hits on Christian radio in 2011.  This disc features 33 songs (39 on the deluxe edition).  s of 27, 2011 , the WOW series, of which this release is a part, has sold 17 million copies.

Supporting paragraphs: WOW Hits 2004 Amy Grant
Answer: contemporary Christian music