Question: What song was written by Sam Lewis did the group composed of Nayeon and Jeongyeon and other girls sing?

full_context: Document 1: Page Two (EP): Page Two is the second extended play (EP) by South Korean girl group Twice. The album was released digitally and physically on April 25, 2016 by JYP Entertainment and distributed by KT Music. It contains seven tracks, including the lead single, "Cheer Up". "Page Two" has the most first-week sales out of all K-pop girl group releases in 2016.
Document 2: Cheer Up (song): "Cheer Up" is a song recorded by South Korean girl group Twice, the lead single of their second extended play (EP) "Page Two". It was released on April 25, 2016 by JYP Entertainment and distributed by KT Music. It is written and composed by Sam Lewis and Black Eyed Pilseung respectively.
Document 3: Up (The Saturdays song): "Up" is a song by British-Irish recording girl group The Saturdays from their debut studio album, "Chasing Lights (2008)". It was co-written by the track's producers, Josef Larossi and Andreas Romdhane of Quiz & Larossi, in collaboration with Ina Wroldsen and Rhys Barker. "Up" was first released by Fascination and Polydor Records on 12 October 2008 as the second single from "Chasing Lights". It was accompanied by a B-side entitled "Crashing Down"; originally recorded by the Nolans in 1982, and written by Benjamin Findon, Robert Puzey and Mike Myers, and produced by Jewels & Store. The Saturdays previously collaborated with Ina Wroldsen for their debut single "If This Is Love", as well as on six other tracks chosen for the album. Future singles including Ego, also came from collaboration with Ina Wroldsen and Rhys Barker. The song is upbeat and, has prominent pop and electropop genre characteristics. It contains lyrical influences from feelings of feminism and self-confidence in a personal relationship with your lover.
Document 4: Twice discography: South Korea-based girl group Twice have released four extended plays (one of which was reissued under a different title), one compilation album, one compilation EP, and five singles. Formed by JYP Entertainment in 2015 through the survival show "Sixteen", Twice debuted in October 2015 with the release of their first EP, "The Story Begins", and its single "Like Ooh-Ahh". The EP and the single peaked at No. 3 and No. 10 on the Gaon Music Chart, respectively. "The Story Begins" eventually sold over 120,000 copies, becoming the best-selling debut extended play by a K-pop girl group of all time, breaking the record set by Girls' Generation's first extended play "Gee" (2009), which sold nearly 100,000 copies.
Document 5: Cheer Up! (TV series): Cheer Up! (; lit. " Sassy, Go Go") is a 2015 South Korean television series starring Jung Eun-ji, Lee Won-keun, Cha Hak-yeon, Ji Soo and Chae Soo-bin. It aired from October 5, 2015 until November 10, 2015 on KBS2 every Monday and Tuesday at 22:00 KST for 12 episodes.
Document 6: Mr. Chu: "Mr. Chu" is a song by South Korean girl group Apink. The song is their 5th Korean single and served as the lead single from their 4th mini-album "Pink Blossom". It was released on March 31, 2014 by A Cube Entertainment. The song composed by Duble Sidekick. The song's music video was directed by Digipedi and released on the same day. Apink performed the song for the first time on KBS's "Music Bank" on April 4. The song peaked at number 2 on Billboard's K-Pop Hot 100. Apink won six music show trophies for "Mr. Chu" and wrapped up promotions for Mr. Chu on May 25. The song was the eighth best selling digital song in 2014, according to Gaon's year-end chart. "Mr.Chu" was used for G9 TV commercial featuring Apink and comedian Lee Guk-Joo. The Japanese version of "Mr. Chu" released as their second Japanese single on February 18, 2015. On January 22, 2015 the short PV for "Mr. Chu" 'on-stage' Japanese version was released.
Document 7: I.O.I: I.O.I (; also known as IOI or Ideal of Idol) was a South Korean girl group formed by CJ E&M through the 2016 reality show "Produce 101" on Mnet. The group was composed of eleven members chosen from a pool of 101 trainees from various entertainment companies: Lim Na-young, Kim Chung-ha, Kim Se-jeong, Jung Chae-yeon, Zhou Jieqiong, Kim So-hye, Yu Yeon-jung, Choi Yoo-jung, Kang Mi-na, Kim Do-yeon and Jeon So-mi. They debuted on May 4, 2016 with the EP "Chrysalis" and actively promoted as a whole and as a sub-unit for less than a year.
Document 8: Happy Pledis 2nd Album: Happy Pledis 2nd Album is a charity single by the South Korean music label Pledis Entertainment's artists Son Dam-bi, Kahi, After School, NU'EST's JR and Baekho, Hello Venus's Yoo Ara and Lime and Pre-School Girl Park Jung-hyun. The album was released under the name "Happy Pledis 2nd Album" and is a charity release. As NU'EST and Hello Venus hadn't officially debuted then, the album doesn't include all the members of the two groups, and NU'EST went by the name "Pledis Boys". The album consisted of tracks "Love Letter", "Winter’s Tale", and "How Are You".
Document 9: Verse 2: Verse 2 is the first extended play by South Korean male duo JJ Project. It was released on July 31, 2017 under JYP Entertainment and incorporates a variety of genres like pop, hip-hop and rock. The album contains eight tracks, two out of the eight songs are only available on the physical release. The track "Tomorrow, Today" was chosen as the lead single for the promotional cycle.
Document 10: Twice (band): Twice (; Japanese: トゥワイス) is a South Korean girl group formed by JYP Entertainment through the 2015 reality show "Sixteen". The group is composed of nine members: Nayeon, Jeongyeon, Momo, Sana, Jihyo, Mina, Dahyun, Chaeyoung, and Tzuyu. The group debuted on October 20, 2015 with the extended play (EP) "The Story Begins".
Document 11: Sixteen (TV series): Sixteen (, stylized as SIXTEEN) was a 2015 reality girl group survival show created by JYP Entertainment and Mnet. The show pitted sixteen JYP trainees against one another to secure a spot in the girl group Twice. "Sixteen" contestants were assessed for not only their singing and dancing abilities but also their charisma and personality. The show premiered on May 5, 2015, and ran for ten episodes through July 7, 2015, on Mnet.
Document 12: Like Ooh-Ahh: "Like Ooh-Ahh" () is a song recorded by South Korean girl group Twice, the lead single of their debut extended play (EP) "The Story Begins". It was released on October 20, 2015 by JYP Entertainment and distributed by KT Music. It is written and composed by Black Eyed Pilseung and Sam Lewis.
Document 13: Twicecoaster: Lane 1: Twicecoaster: Lane 1 (stylized as TWICEcoaster : LANE 1) is the third extended play (EP) by South Korean girl group Twice. The EP was released digitally and physically on October 24, 2016 by JYP Entertainment and distributed by KT Music. It contains seven tracks, including the lead single "TT" (refers to the emoticon used to express crying or sadness). The EP is the highest selling K-pop girl group album of 2016, which sold 350,852 units at year-end.
Document 14: Cheerful Sensibility: Cheerful Sensibility is the first studio album by South Korean band F.T. Island, released on 5 June 2007. The album contains 13 songs divided into two sections: "Emotional Chapter" consists of rock ballads, while "F.T. Island Chapter" is made up of pop-rock songs written by Japanese composers. The album sold 79,000 copies and became the sixth most sold album of the year in South Korea. It was re-released on 3 December by the title "The Refreshment", with three new songs. The package included a Music 2.0 program, which enabled changes to the levels of vocals and instruments. It sold 25,724 copies.
Document 15: TT (song): "TT" is a song recorded by South Korean girl group Twice, the lead single of their third extended play (EP) "". The song was released on October 24, 2016 by JYP Entertainment and distributed by KT Music. It is written and composed by Sam Lewis and Black Eyed Pilseung respectively. The title "TT" refers to the emoticon used to express crying or sadness.
ground_truth: "Cheer Up"