Question: What singer made appearances during Keith Urban's Ripcord World Tour who also the winner of the  fourth season of "American Idol"?

full_context: Document 1: Kelly Clarkson discography: American singer Kelly Clarkson has released seven studio albums, four extended plays, one compilation album, one remix album, and 38 singles (including four as a featured artist). In 2002, she won the inaugural season of the television competition "American Idol" and was immediately signed to a 1 million recording deal with RCA Records. She made her chart debut in September 2002 with the double A-side single "Before Your Love" / "A Moment Like This", which topped the "Billboard" Hot 100 chart in the United States by achieving the biggest jump to number one. Her debut album, "Thankful", was released in April 2003 and debuted atop the "Billboard" 200 chart in the United States and was certified in four countries, including a double-platinum certification by the Recording Industry Association of America (RIAA). Its lead single, "Miss Independent", charted in nine countries, reaching number nine on the "Billboard" Hot 100. Subsequent singles from the album include "Low" and "The Trouble with Love Is". In 2004, Clarkson released her second album, "Breakaway", which incorporated aspects of pop rock. "Breakaway" debuted at number three on the "Billboard" 200 and subsequently became her most successful studio album to date, being certified sextuple-platinum in the United States and twelve million worldwide. Its first four singles, "Breakaway", "Since U Been Gone", "Behind These Hazel Eyes", and "Because of You", became successful hits worldwide, charting at the top-ten in many countries, and with the latter-most topping the charts in the Netherlands and Switzerland. Its final single, "Walk Away", became a top-twenty hit in many countries.
Document 2: Kelly Clarkson: Kelly Brianne Clarkson (born April 24, 1982) is an American singer, songwriter, actress and author. She rose to fame in 2002 after winning the inaugural season of the television series "American Idol", which earned her a record deal with RCA Records. Clarkson's debut single, "Before Your Love/A Moment Like This", topped the US "Billboard" Hot 100 chart and became the best-selling single of 2002 in the nation. It was followed by the release of her debut studio album, "Thankful" (2003), which debuted at number one on the "Billboard" 200 chart. Trying to reinvent her image, Clarkson decided to part ways with "American Idol" management and developed a more pop rock sound for her second album, "Breakaway" (2004). It sold over 12 million copies worldwide and earned Clarkson two Grammy Awards. She took further creative control for her third album, "My December" (2007), by becoming the executive producer and co-writing the entire album. However, it caused a feud with her label, that was dissatisfied with her darker, less commercial rock music and reluctantly promoted the album.
Document 3: Native Tour: The Native Tour (also known as the Native Summer Tour in North America or Native Fall Tour in Europe) is the third headlining concert tour by American pop-rock band, OneRepublic in support of their third studio album, "Native" (2013). OneRepublic were joined on the Native Summer leg of the tour by, The Script and American Authors, and on the European "Native Fall Tour" leg by Kongos. The tour has traveled across five continents; Asia, Europe, Oceania, North America, and Africa. The tour began on April 2, 2013, in Milan, Italy and finished on September 20, 2015, in São Paulo, Brazil.
Document 4: Queen + Adam Lambert Tour 2017–2018: The Queen + Adam Lambert Tour 2017–2018 is an ongoing worldwide concert tour by British rock band Queen and American singer Adam Lambert. The North American leg began on 23 June 2017, in Glendale, Arizona at the Gila River Arena and continued throughout the continent until its last show at the Toyota Center in Houston. In Continental Europe, the tour will begin in Prague on 1 November 2017 and end in Copenhagen on 22 November before recommencing for a UK and Ireland arena tour on 25 November. The UK leg will end with a show at the Barclaycard Arena in Birmingham on 16 December 2017. The group will then play concerts in Oceania starting on 17 February 2018 in Auckland, with current plans indicating that the overall tour will end on 6 March with a show at Perth Arena. The tour marks the group's second visits to North America and Oceania, both of which took place in 2014 as part of the Queen + Adam Lambert Tour 2014–2015.
Document 5: Hillary Lindsey: Hillary Lindsey is an American singer-songwriter. She has written songs with or for several popular artists including Michelle Branch, Faith Hill, Martina McBride, Shakira, Lady Antebellum, Gary Allan, Sara Evans, Carrie Underwood, Kellie Pickler, Bon Jovi, Taylor Swift, Lady Gaga, Tim McGraw and Luke Bryan. Lindsey won a Grammy Award for Best Country Song for Carrie Underwood's "Jesus, Take the Wheel". In 2011, Lindsey received an Academy Award nomination for "Coming Home", recorded by Gwyneth Paltrow for the soundtrack of "Country Strong", in the Best Original Song category. "Coming Home" also received a Golden Globe that same year for Best Original Song along with "There's A Place For Us", making Lindsey a double nominee in 2011. As of 2015, she has had 15 number one singles as a writer.
Document 6: Shania Twain: Shania Twain, OC ( ; born Eilleen Regina Edwards; August 28, 1965) is a Canadian singer and songwriter. Twain has sold over 100 million records, making her the best-selling female artist in country music history and among the best-selling music artists of all time. Her success garnered her several honorific titles including the "Queen of Country Pop".
Document 7: Virtual Reality World Tour: The Virtual Reality World Tour is the tenth headlining tour from American country music singer Brad Paisley and is in support of his eighth studio album, "This Is Country Music" (2011). The tour began on January 12, 2012, in Grand Rapids, Michigan and ended on November 13, 2012, in Dublin, Ireland. It ranked sixteen for Billboard's "Top 25 Tours of 2012".
Document 8: Ripcord World Tour: The Ripcord World Tour (stylized as the ripCORD World Tour) was the eleventh concert tour by Australian singer Keith Urban. The tour was in support of his tenth studio album "Ripcord" (2016). The tour began on 2 June 2016 in Bonner Springs, Kansas and concluded on 17 December 2016 with two shows in Brisbane, Australia. Brett Eldredge, Maren Morris and Dallas Smith were supporting acts for Urban in North America. The Oceania leg of the tour was co-headlined with American singer Carrie Underwood, with Buchanan as opening act.
Document 9: Trisha Yearwood discography: American country artist Trisha Yearwood has released twelve studio albums, seven compilation albums, one additional album, forty one music videos, fifty-eight singles and has appeared on twenty eight albums. Yearwood's self-titled debut album was released in 1991, peaking at number two on the "Billboard" Top Country Albums chart and number thirty one on the Billboard 200. It became the first debut female country album to sell one million copies, eventually certifying double platinum by the Recording Industry Association of America. "She's in Love with the Boy" became the first female debut single since 1964 to top the "Billboard" Hot Country Singles chart. The album would spawn an additional three singles, including "The Woman Before Me". Her second studio album was the critically acclaimed "Hearts in Armor" (1992). It spawned the top five country hits "Wrong Side of Memphis" and "Walkaway Joe". Her third studio record "The Song Remembers When" (1993) enjoyed similar success while the lead single reached number two on the Billboard country chart. A holiday album appeared before her platinum-selling fourth studio album "Thinkin' About You" (1995). Reaching the third position of the country albums chart and the top thirty of the Billboard 200, its first two singles topped the Hot Country Singles chart. Her sixth studio album "Everybody Knows" (1996) spawned Yearwood's fourth number one single, "Believe Me Baby (I Lied)".
Document 10: Break on Me: "Break on Me" (stylized as "Break on Me.") is a song written by Ross Copperman and Jon Nite and recorded by New Zealand-born Australian country music singer Keith Urban. It was released on 23 October 2015 as the second single from his ninth studio album, "Ripcord", through Hit Red and Capitol Nashville. The bass-driven ballad was co-produced by Urban with Nathan Chapman and has been deemed a stylistic counterpoint to its funky predecessor "". The song is also the second of his career not to have an accompanying music video, after 2010's "I'm In".
Document 11: Wynonna Judd: Wynonna Ellen Judd ( ; born Christina Claire Ciminella; May 30, 1964) is an American country music singer. Her solo albums and singles are all credited to the single name Wynonna. She first rose to fame in the 1980s alongside her mother Naomi in the country music duo The Judds. They released seven albums on Curb Records in addition to 26 singles, of which 14 were number-one hits.
Document 12: Carrie Underwood: Carrie Marie Underwood (born March 10, 1983) is an American singer, songwriter, and actress. She rose to fame as the winner of the fourth season of "American Idol" in 2005. Her debut album, "Some Hearts", was released in 2005. Bolstered by the huge crossover success of the singles "Jesus, Take the Wheel" and "Before He Cheats", it became the best-selling solo female debut album in country music history, the fastest-selling debut country album in Nielsen SoundScan history and the best-selling country album of the last 14 years. Underwood won three Grammy Awards for the album, including Best New Artist.
Document 13: Us + Them Tour: The Us + Them Tour is an ongoing concert tour by Roger Waters, formerly of Pink Floyd. The tour will visit the United States and Canada, showcasing songs from Waters' career both with Pink Floyd and as a solo artist. Also considered as the tour of his most recent album "Is This the Life We Really Want?", because this is the first time he plays songs from that record. It opened on 26 May 2017 in Kansas City, MO, and the North American leg of the show will end on 28 October 2017 in Vancouver, BC. Waters has revealed that he will take the tour to Australia and New Zealand, and later to Europe, during 2018, and some dates for Europe and Oceania were announced during the month of September 2017.
Document 14: The Hunting Party Tour: The Hunting Party Tour was the eleventh concert tour by American alternative metal band Linkin Park. It was launched in support of Linkin Park's sixth studio album, "The Hunting Party" (2014). The tour was partially announced in May 2014 through a teaser released after the release of trailer of a co-headlined tour "Carnivores Tour" by Linkin Park and Thirty Seconds to Mars. Later, the tour was officially announced on November 23 with a whole trailer in promotion. Its first leg under the name "European Tour" began on May 30, 2014, in Lisboa, Portugal, and ended on June 14 in Castle Donington, England, where they played "Hybrid Theory" as a whole album. The tour features special guests Of Mice & Men and Rise Against. On January 15, 2015, the band begun the "world" tour for The Hunting Party with the first leg under "North American Tour". During a show at Indianapolis, Chester Bennington injured his leg, which led to the cancellation of the tour "North American Tour". The band continued the world tour on May 9, performing at the first edition of Rock In Rio in America. It is the last full tour to feature Chester Bennington as vocalist before his death in 2017.
Document 15: The Ride Tour: The Ride Tour is the ongoing second concert tour by English indie rock band Catfish and the Bottlemen, in support of the group's second studio album "The Ride". The tour was announced in February 2016 and began on 4 April 2016, in Glasgow, United Kingdom at the O2 Academy Glasgow. The tour is planned to travel across Europe and North America with a total of 50 shows planned so far. On 22 February 2016, the band announced an April 2016 stint of shows in UK, including Glasgow, Halifax, Southend On Sea, Doncaster, London and Brighton. The band will also headline several festivals across the UK throughout the summer, including Liverpool's 'Sound City' in May 2016, Bristol's Summer Series in July 2016 and Manchester's Castlebowl in July 2016. On 14 March 2016 it was announced that the band will play several dates in North America in June 2016. The band are also scheduled to play several European festivals this year, including Scotland's T in the Park, Spain's Benicàssim festival, Cumbria's Kendal Calling in July 2016, Cornwall's Boardmasters Festival in August 2016 and Germany's Lollapalooza in September 2016. The band will also support Welsh rock band Stereophonics on their Wrexham, Racecourse Ground stadium gig in July 2016, as part of their Keep the Village Alive tour.
ground_truth: Carrie Underwood