Question: Kellie Pickler is the self-titled second studio album by the American country artist, Since the albums' release, three more singles have charted; including which song, written and performed by American country artist Kellie Pickler, and co-written by Taylor Swift, at number 9?

full_context: Document 1: Kellie Pickler (album): Kellie Pickler is the self-titled second studio album by American country artist Kellie Pickler. The lead-off single, "Don't You Know You're Beautiful", was debuted at the 43rd Academy Of Country Music awards and peaked at 21 on Hot Country Songs. The album was released via BNA Records/19 Recordings on September 30, 2008. Since the albums' release, three more singles have charted; "Best Days of Your Life" at number 9 (which was co-wrote with fellow country artist Taylor Swift), "Didn't You Know How Much I Loved You" at number 14 (a re-recording of an album cut from Pickler's debut album "Small Town Girl") and "Makin' Me Fall in Love Again" at number 30.
Document 2: Don't You Know You're Beautiful: "Don't You Know You're Beautiful" is a song written by Chris Lindsey, Aimee Mayo, and Karyn Rochelle (who co-wrote her previous hits "Red High Heels" and "I Wonder"), and recorded by American country artist Kellie Pickler. It served as the lead-off single to her self-titled second album. Pickler debuted the song at the 43rd annual Academy of Country Music Awards, and it was officially released to radio in June as the fourth single of her career.
Document 3: Best Days of Your Life: "Best Days of Your Life" is a song written and performed by American country artist Kellie Pickler, and co-written by Taylor Swift. It was released on December 1, 2008 as the second single from her self-titled second album. Swift also provides background vocals on the song. The song is about a narrator explaining how her former boyfriend cheated on her and moved on to a new girlfriend to start a family with, wishing them well on their new life but says that the new girl won't top what they previously once had before.
Document 4: List of songs recorded by Kelly Clarkson: American singer Kelly Clarkson has recorded material for her seven studio albums. After signing a contract in 2002 with RCA Records, a division of then-Bertelsmann Music Group (now Sony Music), 20-year-old Clarkson released the double A-side single "Before Your Love" / "A Moment Like This" and began to record tracks for her debut studio album, "Thankful" (2003). Its lead single, "Miss Independent", received a nomination for a Grammy Award for Best Female Pop Vocal Performance in 2004. "Miss Independent" was followed by "Low" and "The Trouble With Love Is", which was featured as a single from the soundtrack of the film "Love Actually". In 2004, Clarkson recorded the song "Breakaway", which was released as a single from the of the film "". The song's commercial success inspired Clarkson to name her second studio album "Breakaway". The album won a Grammy Award for Best Pop Vocal Album in 2006, while its second single, "Since U Been Gone", won for Best Female Pop Vocal Performance. Subsequent singles, "Behind These Hazel Eyes" (2005), "Because of You" (2005), and "Walk Away" (2006), became successful hits. Clarkson's third studio album, "My December", was released in 2007. The album became a subject of a dispute with then RCA Music Group chairman Clive Davis, who criticized the album and suggested that Clarkson reunite with her previous collaborators. "Never Again", the lead single from "My December", became its only hit single. Succeeding releases from "My December" included "Sober", "One Minute", and "Don't Waste Your Time".
Document 5: I Wonder (Kellie Pickler song): "I Wonder" is a song written by Chris Lindsey, Aimee Mayo, Karyn Rochelle, and co-written and recorded by American country artist Kellie Pickler. It was released as the second single from her debut album "Small Town Girl" (2006), on February 5, 2007.
Document 6: Liz Rose: Liz Rose (born in Dallas, Texas) is an American country music songwriter best known for her work with Taylor Swift. She has co-written twenty of Swift's officially-released songs and singles, including "White Horse," "Teardrops on My Guitar," and "You Belong with Me," which won her and Swift a Grammy Award in 2010.
Document 7: Back to December: "Back to December" is a song written and recorded by American singer/songwriter Taylor Swift for her third studio album "Speak Now" (2010). The song was sent to country radio in the United States on November 15, 2010, as the second single from "Speak Now". According to Swift, "Back to December" is the first time she ever apologizes to someone in a song. Critics speculate that the song is about Taylor Lautner, Swift's ex-boyfriend, which was later acknowledged by Lautner. "Back to December" is considered an orchestral country pop ballad and its lyrics are a remorseful plea for forgiveness for breaking up with a former lover.
Document 8: Fearless (Taylor Swift album): Fearless is the second studio album by the American singer-songwriter Taylor Swift. The album was released on November 11, 2008, by Big Machine Records. As with her first album, "Taylor Swift", Swift wrote or co-wrote all thirteen tracks on "Fearless". Most of the songs were written as the singer promoted her first album as the opening act for numerous country artists. Due to the unavailability of collaborators on the road, eight songs were written by Swift. Other songs were co-written with Liz Rose, Hillary Lindsey, Colbie Caillat, and John Rich. Swift also made her debut as a record producer, co-producing all songs on the album with Nathan Chapman.
Document 9: Beautiful Eyes: Beautiful Eyes is the second extended play (EP) by American singer-songwriter Taylor Swift. The EP was released on July 15, 2008 by Big Machine Records exclusively to Walmart stores in the United States and online. The limited release EP has a primarily country pop sound and features alternate versions of tracks from her debut album, "Taylor Swift" (2006), and two original tracks, "Beautiful Eyes" and "I Heart ?", songs which she had previously written; a DVD, featuring music videos of singles from "Taylor Swift", is also included on the physical release of the EP.
Document 10: Our Song (Taylor Swift song): "Our Song" is a country song performed by American singer-songwriter Taylor Swift. The song was written by Swift and produced by Nathan Chapman. It was released on September 9, 2007 by Big Machine Records as the third single from Swift's eponymous debut album, "Taylor Swift" (2006). Swift solely composed "Our Song" for the talent show of her freshman year in high school, about a boyfriend who she did not have a song with. It was included on "Taylor Swift" as she recalled its popularity with her classmates. The uptempo track is musically driven mainly by banjo and lyrically describes a young couple who use the events in their lives in place of a regular song.
Document 11: You Belong with Me: "You Belong with Me" is a song performed by American singer-songwriter Taylor Swift. The song was co-written by Swift and Liz Rose and produced by Nathan Chapman with Swift's aid. It was released on April 18, 2009, by Big Machine Records as the third single from Swift's second studio album, "Fearless" (2008). Swift was inspired to write "You Belong with Me" after overhearing a male friend of hers arguing with his girlfriend through a phone call; she continued to develop a story line afterward. The song contains many pop music elements and its lyrics have Swift desiring an out-of-reach love interest.
Document 12: Makin' Me Fall in Love Again: "Makin' Me Fall in Love Again" is a song written by Karyn Rochelle, James T. Slater, and Shane Stevens, and recorded by American country artist Kellie Pickler. It was released in April 2010 as the fourth single from her self-titled second album. The song is about someone being in love and still having that feeling, despite being told that it will fade away. Pickler said that it reflected her current relationship.
Document 13: 100 Proof (album): 100 Proof is the third studio album by American country music artist Kellie Pickler. It was released on January 24, 2012. The album includes the single "Tough". The title track, was released exclusively on iTunes on December 20, 2011. The album sold 27,000 copies in the first week, and is the highest-charting album of Pickler's career on the "Billboard" 200 and the Digital Albums chart.
Document 14: Didn't You Know How Much I Loved You: "Didn't You Know How Much I Loved You" is a song written by Chris Lindsey, Aimee Mayo, and Troy Verges, and recorded by American country artist Kellie Pickler. It was released in August 2009 as the third single from her self-titled second album, and her sixth single release overall. The song is a ballad where a narrator describes her lost love, responding to him with said song title as a question.
Document 15: 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.
ground_truth: Best Days of Your Life