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"?

Context articles: After All (Cher and Peter Cetera song)
Glory of Love
One More Story
Amy Grant discography
The Next Time I Fall
Next Time (album)
One Good Woman
You're the Inspiration
Solitude/Solitaire
Amy Grant

"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".
"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".)
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."
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.
"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.
Next Time (Macedonian: "Некст Тајм" ) is the debut album of the Macedonian pop rock duo also called Next Time.
 The release of the album marked Next Time's fast gained success as part of the Macedonian music scene.
 After releasing 4 singles in just about 4 months, Next Time entered the studio for completing their first musical project and recorded 9 other songs.
 The finished album contained 13 songs, two of which were sung in a language other than Macedonian.
 It was a mix of slow and fast songs, topped with a bonus track in English and a cover from an old Italian pop-opera song.
 At the promotion for the album held in the hotel Holiday Inn in Skopje, Macedonia over 2,000 people were present to support the newly formed duo and their first album.
 After a brief note from producer Jovan Jovanov, the duo performed 6 songs from the CD live at the promotion to the pleasure of the gathered crowd.
"One Good Woman" is a popular song from 1988 by Peter Cetera, formerly the lead singer of the rock band Chicago.
 Cetera co-wrote and co-produced the track with Patrick Leonard, and the song was included on Cetera's 1988 album "One More Story".
"You're the Inspiration" is a song written by Peter Cetera and David Foster for the group Chicago and recorded for their album "Chicago 17" (1984), with Cetera singing lead vocals.
 The third single released from that album, it reached number 3 on the US "Billboard" Hot 100 chart in January 1985, and also climbed to the top position on the adult contemporary chart at the same time.
 Peter Cetera re-recorded the song for his 1997 solo album "".
 That same year he also recorded a single version with the vocal R&B group, Az Yet.
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.
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".