Question: Which American songwriter who has written songs for and with multiple music artists, as well as for several films, and contributed to Kathy Troccoli's album Pure Attraction?

full_context: Document 1: Pure (Hayley Westenra album): Pure is the first internationally published album by Christchurch, New Zealand soprano Hayley Westenra. Her previous albums were released only in New Zealand and nearby Australia. This album also received professional consultation from the legendary Sir George Martin who helped to create its "unique appeal". In 2004, it was the highest selling New Zealand Album and so it privileged Hayley with an award from the New Zealand Music Awards of 2004. It was published by the Decca Music Group label in 2003. It was distributed in the United States by Universal Classics in 2004. During its first week of sales it sold 19,068 copies. As of 2007, "Pure" is the best selling classical album for the 21st century in the UK.
Document 2: Chantal Kreviazuk production discography: Canadian singer-songwriter, producer and pianist Chantal Kreviazuk has written, produced and performed on albums and tracks for a wide range recording artists, spanning from adult contemporary, pop, rock, to indie and hip-hop music. Initially, she began writing her own pop songs, especially after a 1994 motorcycle accident in Italy left her immobile for several months, and was signed by Sony Canada, where she released her debut album in June 1997. Chantal later released another album in 1999, before being featured in a range of soundtracks to films and TV series. Chantal began writing for other artists in 2001, where she co-wrote the song "Always and Forever" for Eleanor McCain. However, it was only in 2004 that Chantal started writing for more artists and received recognition as a songwriter. In the summer of 2003, Chantal met Canadian singer-songwriter Avril Lavigne, they formed a relationship of mutual respect and sisterhood, and eventually became songwriting partners. They co-wrote six songs for Lavigne's sophomore album, Under My Skin (2004): "Slipped Away," "Forgotten," "Together," "How Does It Feel," "He Wasn't" and "Who Knows." Kreviazuk described "He Wasn't" as "a super-fun, punk, screw-you-to-boys song," while "Forgotten" is a driving rock song inspired by similarly vibed music Lavigne was consumed with at the time. Also in 2004, Chantal co-wrote "Rich Girl", for Gwen Stefani's solo debut album, "Love. Angel. Music. Baby.", along with Dr. Dre, Jerry Bock, Mark Batson, Kara DioGuardi, Mike Elizondo, Sheldon Harnick and Eve. The song became a chart success, reaching the top-ten in over fifteen countries. Chantal also wrote for Kelly Clarkson's breakthrough album "Breakaway" in the end of 2004, sharing writing credits for the tracks "Where is Your Heart" and "Walk Away". In 2005, Chantal's co-writing song "He Wasn't" was released as Lavigne's final single from "Under My Skin", receiving a moderate impact on the charts and reaching only the top-forty in some countries. While in 2006, Clarkson's "Walk Away" was released as "Breakaway"'s final single, reaching the top-twenty in some countries.
Document 3: Heart and Soul (Kathy Troccoli album): Heart and Soul is the second studio album by singer-songwriter Kathy Troccoli. This album received a Grammy nomination in 1984, and contains songs written by Michael W. Smith. It featured music popular with CCM, as well as synthpop friendly songs, "I Belong To You", "Holy Holy", and "Hearts Of Fire". The album features the songwriting skills of Brown and Debbie Bannister, Amy Grant, Gary Chapman, Michael W. Smith, as well as others. The music is a blend of contemporary pop, synthpop, and gospel music. It was released as a vinyl LP record.
Document 4: Love and Mercy (album): Love and Mercy is the seventh full-length album by Christian music singer-songwriter Kathy Troccoli. It saw her move back into CCM, with a heavy dose of gospel music.
Document 5: List of songs recorded by Rihanna: Barbadian singer Rihanna has recorded material for her eight studio albums and has collaborated with other artists for duets and featured songs on their respective albums and charity singles. After signing a record contract with the Def Jam Recordings in February 2005, Rihanna began to work with producers Carl Sturken and Evan Rogers, who co-wrote and co-produced 12 out of the 15 songs on her 2005 debut album, "Music of the Sun". Award-winning songwriter Diane Warren co-wrote the title track, while Grammy Award-winning singer-songwriter Deniece Williams co-wrote the song "Willing to Wait". Sturken and Rogers co-wrote and co-produced 9 songs out of 16 on Rihanna's 2006 album "A Girl like Me". The album's lead single "SOS" was written by Evan "Kidd" Bogart and J. R. Rotem. It contains a sped-up sample of "Tainted Love", written in 1965 by Ed Cobb, who was credited as a co-writer on "SOS".
Document 6: Diane Warren: Diane Eve Warren (born September 7, 1956) is an American songwriter. She rose to prominence in 1983, and has since written songs for and with multiple music artists, as well as for several films.
Document 7: Nancy Warren (author): Nancy Warren is a Pacific Northwest author of contemporary romance novels. She received her first publication contract after winning Harlequin's 2000 Summer Blaze contest. Since then, she has released 30 novels and novellas, been twice nominated for the Romance Writers of America's RITA Award, and won a "Romantic Times" Reviewers' Choice Award.
Document 8: Mervyn Warren: Mervyn Edwin Warren (born February 29, 1964) is an American film composer, record producer, music conductor, music arranger, lyricist, songwriter, pianist, and vocalist. Warren is a five-time Grammy Award winner and a 10-time Grammy Award nominee. Warren has written the underscore and songs for many feature and television films and has written countless arrangements in a variety of musical styles for producers Quincy Jones, David Foster, Arif Mardin, and dozens of popular recording artists, including extensive work on Jones' "Back on the Block," "Q's Jook Joint," and "Q: Soul Bossa Nostra."
Document 9: Pure Attraction: Pure Attraction is the fourth full-length album by singer-songwriter Kathy Troccoli. It saw her moving slowly away from Christian music and into pop territory, with two songs written by Diane Warren. It featured the top five CCM and top twenty pop hit "Everything Changes", and featured seven songs co-written by Troccoli.
Document 10: Kara DioGuardi: Kara Elizabeth DioGuardi ( ; born December 9, 1970) is an American singer-songwriter, record producer, music publisher, A&R executive, composer and TV personality. She writes music primarily in the pop rock genre. DioGuardi has worked with many popular artists; sales of albums on which her songs appear exceed 160 million worldwide. DioGuardi is a Grammy and Emmy-nominated writer. She's a 2011 NAMM Music For Life Award winner, 2009 NMPA Songwriter Icon Award winner, 2007 BMI Pop Songwriter of the Year, and has received 20 BMI Awards for co-writing the most performed songs on the radio.
Document 11: Purified (album): Purified is the seventh solo album by gospel artist CeCe Winans. This album was released under her own label, Pursprings Gospel. The singles "Pray" and "All That I Need" were released in July in anticipation of the album's release. Winans' nephew, Mario Winans, produced the hit single "Pray" while her son, Alvin Love III, helped write three songs on the album.
Document 12: Kathy Troccoli (album): "Kathy Troccoli" is the self-titled full-length album from singer-songwriter Kathy Troccoli. It was released on Reunion Records in 1994. Like her previous release, Pure Attraction, it featured a heavy emphasis on pop songs, with songwriter Diane Warren contributing one track.
Document 13: Corner of Eden: Corner of Eden is the ninth full-length album from singer-songwriter Kathy Troccoli. It marks the first time she co-wrote all of the album's songs.
Document 14: Harry Warren: Harry Warren (born Salvatore Antonio Guaragna, December 24, 1893 – September 22, 1981) was an American composer and lyricist. Warren was the first major American songwriter to write primarily for film. He was nominated for the Academy Award for Best Song eleven times and won three Oscars for composing "Lullaby of Broadway", "You'll Never Know" and "On the Atchison, Topeka and the Santa Fe". He wrote the music for the first blockbuster film musical, "42nd Street", choreographed by Busby Berkeley, with whom he would collaborate on many musical films.
Document 15: Dionne Warwick: Dionne Warwick ( ) (born Marie Dionne Warrick; December 12, 1940) is an American singer, actress and television show host, who became a United Nations Global Ambassador for the Food and Agriculture Organization, and a United States Ambassador of Health.
ground_truth: Diane Warren