Question: What song did the artist of the UK's biggest selling single of 2017 write for Justin Bieber?

full_context: Document 1: Love Yourself: ``Love Yourself ''is a song recorded by Canadian singer Justin Bieber for his fourth studio album Purpose (2015). The song was released first as a promotional single on November 8, 2015, and later was released as the album's third single. It was written by Ed Sheeran, Benny Blanco and Bieber, and produced by Blanco. An acoustic pop song,`` Love Yourself'' features an electric guitar and a brief flurry of trumpets as its main instrumentation. During the song, Bieber uses a husky tone in the lower registers. Lyrically, the song is a kiss - off to a narcissistic ex-lover who did the protagonist wrong.
Document 2: Somebody to Love (Justin Bieber song): "Somebody to Love" is a song performed by Canadian recording artist Justin Bieber. The song served as the second single from his album, "My World 2.0". It was written by Heather Bright and The Stereotypes, and produced by the latter. The song was originally recorded as a demo by Bieber's mentor, R&B singer, Usher, for his sixth studio album, "Raymond v. Raymond" (2010). After things went stale with Usher's label, The Stereotypes were encouraged to give the song to Bieber, who recorded it, with Usher performing background vocals. The song is an upbeat pop song, which also derives from R&B genre, while making use of Eurodisco influences. It impacted US mainstream and rhythmic radio on April 20, 2010. The remix of the song featuring Usher was featured on Bieber's first compilation album "" and his second remix album "".
Document 3: Love Yourself: Tear: Love Yourself 轉 'Tear' (stylized as LOVE YOURSELF 轉 'Tear') is the third Korean studio album (sixth overall) by South Korean boy band BTS. The album was released on May 18, 2018 by Big Hit Entertainment. It is available in four versions and contains eleven tracks, with ``Fake Love ''as its lead single. The concept album explores themes relating to the pains and sorrows of separation. It debuted at number one on the US Billboard 200, becoming BTS 'highest - charting album in a Western market, as well as the first K - pop album to top the US albums chart and the highest - charting album by an Asian act.
Document 4: List of UK top-ten singles in 2017: Ed Sheeran had the best - selling and streamed single of the year with ``Shape of You ''. The song spent twenty - two weeks in the top 10 (including fourteen weeks at number one), sold over 787,000 copies as well as scoring 248 million streams (3.2 million combined sales) and was certified 5x platinum by the BPI.`` Despacito'' by Luis Fonsi, Daddy Yankee & Justin Bieber came in second place with more than 2.3 million combined sales. Ed Sheeran's ``Castle on the Hill '',`` Unforgettable'' from French Montana featuring Swae Lee and ``Galway Girl ''by Ed Sheeran made up the top five. Songs by Ed Sheeran (`` Perfect''), Clean Bandit featuring Zara Larsson, Rag'n'Bone Man, The Chainsmokers & Coldplay and Jax Jones featuring RAYE were also in the top ten best - selling singles of the year.
Document 5: List of best-selling singles in the United Kingdom: The best - selling single in the UK is ``Something About the Way You Look Tonight ''/ Candle in the Wind 1997'', a double A-side released by Elton John following the death of Diana, Princess of Wales. Since September 1997, the single has sold over 4.93 million copies in the UK.
Document 6: Love Yourself: Lyrically, ``Love Yourself ''is a kiss - off to a narcissistic ex-lover who did the protagonist wrong, with Bieber singing in a snappy and spiteful tone while`` hating on a girl for loving herself too much.'' In the pre-chorus, he sings with a husky tone in the lower registers: ``My mama do n't like you, and she likes everyone, ''`` in a style that molds well to Sheeran's,'' according to Rolling Stone's Brittany Spanos. ``And I (never) like to admit that I was wrong. And I've been so caught up in my job, did n't see what's going on, and now I know, I'm better sleeping on my own, ''he continues. In the chorus, Bieber sings,`` Cause if you like the way you look that much, oh baby you should go and love yourself,'' which according to Digital Spy's Amy Davidson, ``'love yourself' means' go f * * k yourself 'in this context. ''On March 7, 2017, composer Ed Sheeran stated on the Howard Stern Show that he had Rihanna in mind for the song at first, and the original lyric was indeed`` fuck yourself.'' In the song's bridge, Bieber uses a ``brass - and - vocalese ''style.
Document 7: What Do You Mean?: ``What Do You Mean? ''is a song recorded by Canadian singer Justin Bieber for his fourth studio album Purpose (2015). The song was released on August 28, 2015, as the album's lead single by Def Jam. Written by Bieber, Jason`` Poo Bear'' Boyd and Mason Levy, the song was produced by MdL and co-produced by Bieber. ``What Do You Mean? ''is a pop and tropical house song, with its instrumentation consisting in light flourishes of panpipes, looped vocal samples, piano chords, fervent synths, bass and`` slick beat'' elements with the sound of a clock ticking, while Bieber uses a smooth, soulful vocal. Lyrically, ``What Do You Mean? ''describes not being able to figure out the opposite sex with Bieber asking a girl why her body language is conflicting with her words.
Document 8: Love Yourself: Answer: Love Yourself 結 'Answer' (stylized as LOVE YOURSELF 結 'Answer') is the third Korean - language compilation album by South Korean boy band BTS. The album was released on August 24, 2018 by Big Hit Entertainment and is available in 4 different versions: S, E, L, and F. The album contains twenty - five tracks (twenty - six for digital version), including seven new songs, with the track ``Idol ''serving as the lead single. Most tracks are from Love Yourself: Her, and Love Yourself: Tear, including some remixes. The album debuted at number one in South Korea, Canada and the United States, becoming BTS 'second chart - topping album in the US market.
Document 9: Shape of You: ``Shape of You ''is a song by English singer - songwriter Ed Sheeran. It was released as a digital download on 6 January 2017 as one of the double lead singles from his third studio album ÷ (2017), along with`` Castle on the Hill''.
Document 10: List of most-streamed songs on Spotify: This list of most - streamed songs on Spotify contains the top 100 songs with the most streams of all time, as derived from Spotify charts. As of January 2018, six songs have exceeded 1 billion streams, with Ed Sheeran's ``Shape of You ''ranked in the top position.
Document 11: List of best-selling music artists: This list includes music artists with claims of 75 million or more record sales. The artists in the following tables are listed with both their claimed sales figure along with their total of certified units and are ranked in descending order, with the artist with the highest amount of claimed sales at the top. If two or more artists have the same claimed sales, they are then ranked by certified units. The claimed sales figure and the total of certified units (for each country) within the provided sources include sales of albums, singles, compilation - albums, music videos as well as downloads of singles and full - length albums. Sales figures, such as those from Soundscan, which are sometimes published by Billboard magazine, have not been included in the certified units column. As of 2017, based on both sales claims and certified units, The Beatles are considered the highest - selling band. Elvis Presley is considered the highest - selling individual artist based on sales claims and Rihanna is the highest - selling individual artist based on certified units.
Document 12: Love Yourself: Tear: Love Yourself 轉 'Tear' (stylized as LOVE YOURSELF 轉 'Tear') is the third Korean studio album (sixth overall) by South Korean boy band BTS. The album was released on May 18, 2018 by Big Hit Entertainment. It is available in four versions and contains eleven tracks, with ``Fake Love ''as its lead single. The concept album explores themes relating to the pains and sorrows of separation. On May 27, 2018, the album debuted at number one on the US Billboard 200, earning 135,000 album - equivalent units becoming BTS 'highest - charting album in a Western market, as well as the first K - pop album to top the US albums chart and the highest - charting album by an Asian act.
Document 13: Baby (Justin Bieber song): The song is predominantly upbeat, featuring Bieber's R&B vocals over a backdrop containing a dance infused beat, full of keyboard and ``disco string ''synths. The song is composed in the key of E ♭ major with Bieber's vocal range spanning from the low - note of G to the high - note of C. According to Jody Rosen of Rolling Stone, the song`` blends winks at Fifties doo - wop with hip - hop chants'', comparing the style and the lyrics ``My first love broke my heart for the first time / And I was like / Baby, baby, baby, ooooh / I thought you'd always be mine ''to fifties ballads like`` Tears on My Pillow'', ``Why Do Fools Fall in Love ''and`` Earth Angel''. Lyrically, Bieber's lines explain his distress over his lost love, and promise to get it back, featured in lines like, ``And I wan na play it cool / But I'm losin 'you... / I'm in pieces / So come and fix me... ''. The chorus features the distinct and repetitive`` baby, baby, baby, ohhhh (nooooo)'' hook. After the second verse, Ludacris comes in with the verse - rap, an anecdote of young love when he was thirteen, as it runs ``When I was 13 / I had my first love / She had me going crazy / Oh, I was star - struck / She woke me up daily / Do n't need no Starbucks... ''.
Document 14: Perfect (Ed Sheeran song): ``Perfect ''is a song by English singer - songwriter Ed Sheeran from his third studio album, ÷ (2017). After the album's release it charted at number four on the UK Singles Chart. On 21 August 2017, Billboard announced that`` Perfect'' would be the fourth single from the album. The song was serviced to pop radio on 26 September 2017, as the third single from the album in the United States (fourth overall). The song eventually reached number one on the UK Singles Chart and the US Billboard Hot 100 in December 2017. It also peaked at number one in sixteen other countries, including Australia, Canada, Ireland and New Zealand. A version of ``Perfect '', titled`` Perfect Duet'', with American singer Beyoncé was released on 1 December 2017. Another duet with Italian tenor Andrea Bocelli, titled ``Perfect Symphony '', was released on 15 December 2017.`` Perfect'' also became the UK Christmas number - one song for 2017.
Document 15: List of most-streamed artists on Spotify: Rank Artist Total streams (billions) Country 1. Francesca Michielin 17.1 ITA 2. Justin Bieber 11 CAN As of July 27, 2018
ground_truth: ``Love Yourself ''
sub_queries: who released the uk's biggest selling single of 2017 Answer: Ed Sheeran
what song did Ed Sheeran wrote for justin bieber Answer: ``Love Yourself ''