Question: Who was the singer that is referred to as "The Queen of Christian Pop" and sang a duet with Peter Cetera on the song "The Next Time I Fall"?

full_context: Document 1: Solitude/Solitaire: Solitude/Solitaire is the second solo album by former Chicago bassist and vocalist Peter Cetera, and his first album after leaving the band in 1985. The album was released in June 1986. It includes the hits "Glory of Love" and "The Next Time I Fall" (with Amy Grant). Both reached the No. 1 position on the "Billboard" Hot 100 chart. Produced by Michael Omartian<ref name="Solitude/SolitaireCD"> </ref> (who later co-produced Cetera's 2001 album, "Another Perfect World"), the album was Cetera's greatest solo success, peaking at No. 23 on the "Billboard" 200 chart. It was certified platinum by the RIAA, selling over one million copies in the U.S.
Document 2: Rock of Ages... Hymns and Faith: Rock of Ages... Hymns and Faith is the thirteenth studio album by singer Amy Grant. It is the follow-up to her 2002 release Legacy... Hymns and Faith. "Rock of Ages" is Amy Grant's 11th Christian chart-topping album.
Document 3: 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 4: After All (Cher and Peter Cetera song): "After All" is a 1989 "Billboard" Hot 100 hit song performed as a duet by American singer and actress Cher and American singer and bass player Peter Cetera (former lead vocalist of Chicago), released on February 21, 1989, by Geffen Records. It was used as the love theme for the movie "Chances Are" and was nominated for Best Original Song at the Academy Awards 1989. The song was also the first North American single release from Cher's nineteenth album "Heart of Stone". The song appears on Peter Cetera's 1997 album "" and his 2017 album, "The Very Best of Peter Cetera".
Document 5: 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 6: Fall (Clay Walker song): "Fall", written by Clay Mills, Sonny LeMaire, and Shane Minor, is a song which has been recorded by both country music singer Clay Walker and pop music singer Kimberley Locke, both of whom are signed to Curb Records. Both versions were released within weeks of each other in mid-2007; while Walker's version was released to country radio, Locke's was released to the adult contemporary radio format. Walker's reached number 5 on the U.S. country singles charts, and Locke's reached Number One on the U.S. Dance charts. Go West front man Peter Cox has recorded a version of "Fall" on his 2010 CD "The S1 Sessions".
Document 7: 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 8: 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 9: The Next Time: "The Next Time" backed with "Bachelor Boy" was the first of three number one hit singles from the Cliff Richard musical, "Summer Holiday". Both sides were marketed as songs with chart potential, and the release is viewed retrospectively as a double A-side single. However, technically double A sides were not regarded as such until 1965, so "The Next Time" was pressed as the A-side, with "Bachelor Boy" the B-side (written by Bruce Welch and Cliff Richard). The song was succeeded at number one by The Shadows' "Dance On!".
Document 10: One More Story: One More Story (1988) is the third solo album for music artist Peter Cetera and his second album after leaving the group Chicago. This album includes the hit "One Good Woman," which made it to number four on the Billboard Hot 100 chart. It also includes the single "Best of Times". The album was co-produced by Patrick Leonard and Peter Cetera, and contains an appearance by Leonard's most famous artist at the time, Madonna (appearing on the song "Scheherazade" as 'Lulu Smith'). It also features Pink Floyd guitarist David Gilmour on "Body Language" and "You Never Listen to Me", as well as Oak Ridge Boys bass vocalist Richard Sterban and guitarist/vocalist Bonnie Raitt on "Save Me."
Document 11: 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 12: 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 13: The Next Time I Fall: "The Next Time I Fall" is a song written by Bobby Caldwell and Paul Gordon and recorded as a duet by Peter Cetera and Amy Grant for his 1986 album "Solitude/Solitaire". It reached number one on "Billboard" magazine's Hot 100 and Adult Contemporary chart and was nominated for a Grammy Award for Best Pop Performance by a Duo or Group with Vocals.
Document 14: Glory of Love: "Glory of Love" is a 1986 song by Peter Cetera written and composed by Cetera, David Foster, and Cetera's then-wife Diane Nini, and recorded by Cetera shortly after he left the band Chicago to pursue a solo career. Featured in the 1986 film "The Karate Kid Part II", it was Cetera's first hit single after he left the team, reaching number one on the "Billboard" Hot 100, and it was included on his 1986 album, "Solitude/Solitaire", which Michael Omartian produced.<ref name="Solitude/SolitaireCD"> </ref> (Cetera released this album to coincide with the theatrical release of "The Karate Kid Part II".)
Document 15: 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).
ground_truth: Amy Grant