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

full_context: Document 1: Amy Holland: Amy Celeste Boersma (born August 15, 1953), known professionally as Amy Holland, is an American pop rock singer, songwriter, composer and musician.
Document 2: Time Again... Amy Grant Live: Time Again... Amy Grant Live is the 21st album by Christian music singer-songwriter Amy Grant, released on September 26, 2006 (see 2006 in music).
Document 3: Amy Grant (album): Amy Grant is the eponymous debut studio album by then-teenage Christian singer Amy Grant, released in 1977 on Myrrh Records. Three songs from the album made Top Ten Christian radio airplay: "Old Man's Rubble", "Beautiful Music", and "What a Difference You've Made". The latter track was made more famous by country singer Ronnie Milsap, as "What a Difference You've Made in My Life".
Document 4: Amy Grant discography: American singer-songwriter Amy Grant made her recording debut as a teenager and by the 1980s had gained fame in Christian music thanks to the songs "Father's Eyes", "El Shaddai", and "Angels". In 1986, she had her first number-one single on the "Billboard" Hot 100 in a duet with Peter Cetera, "The Next Time I Fall". Grant was becoming more famous in the world of pop with such albums as "Unguarded" and "Lead Me On". However, it wasn't until her eighth studio album "Heart in Motion" that Grant made a breakthrough into mainstream music. "Heart in Motion" produced the hit singles "Baby Baby", "Every Heartbeat", "That's What Love Is For" and "Good for Me", all of which made it into the top ten of the "Billboard" Hot 100, with the first two reaching No. 1 and No. 2 respectively. It remains Grant's most commercially successful album to date, having been certified five-times platinum by the Recording Industry Association of America. A Christmas album, "Home for Christmas", was released shortly afterwards, reaching No. 2 on the "Billboard" 200, her highest album entry to date. Grant went on to release the albums "House of Love" and "Behind the Eyes" in the mid-nineties. Her first full-length studio album of all-new material since 2003, "How Mercy Looks from Here", was released on May 14, 2013.
Document 5: 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).
Document 6: WOW Gospel 2006: WOW Gospel 2006 is a gospel music compilation album from the WOW series. Released on January 31, 2006, it comprises thirty-two songs on a double disc album. The release reached 20 on the Billboard 200 chart in 2006, the highest peak of any of the WOW Gospel series thus far, and made number one on the Top Gospel Albums chart. The album cover pays tribute to Chicago, Illinois.
Document 7: Amy Lee: Amy Lynn Hartzler (née Lee ; born December 13, 1981), known professionally as Amy Lee, is an American singer, songwriter, record producer and multi-instrumentalist. She is the co-founder and lead vocalist of the rock band Evanescence. Along with her contributions with the band, Lee has also participated on numerous other musical projects including Walt Disney Records' "Nightmare Revisited" and "". Lee has performed collaborations with artists such as Korn, Seether, and David Hodges. Lee is also the American chairperson for the international epilepsy awareness foundation "Out of the Shadows". During Evanescence's hiatus, Lee embarked on her film score career in 2013 by composing the soundtrack to "War Story" (2014) and "" (2015) with cellist Dave Eggar, and the song "Speak to Me" for the film "Voice from the Stone".
Document 8: 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.
Document 9: Myrrh Records: Myrrh Records, also known as Myrrh Worship, was an American Christian music record label. According to "Encyclopedia of American Gospel Music", the label was instrumental in developing a popular following for Contemporary Christian music as the label that first published music by Barry McGuire, 2nd Chapter of Acts, Randy Matthews and Nancy Honeytree. The label is also known for serving as the first label for popular Christian crossover singer Amy Grant, who joined the label in 1977. She stayed with Myrrh until 1999 (staying with Word until 2005).
Document 10: 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.
Document 11: 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).
Document 12: WOW Gospel 2010: WOW Gospel 2010 is a gospel music compilation album from the WOW series. It was released on January 26, 2010 and features thirty gospel hits on a double CD set. The album cover pays tribute to Detroit, Michigan. The album held number one position for several weeks on Billboard's Top Gospel Albums chart, and reached number 40 on the "Billboard" 200 chart in 2010.
Document 13: 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).
Document 14: 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".
Document 15: 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).
ground_truth: contemporary Christian music