Karl Johan Schuster (Swedish pronunciation: [ˈjûːanˈɧʏ̌sːtɛr]; born 1 February 1985), known professionally as Shellback, is a Swedish record producer and songwriter. He was listed as the No. 1 producer of 2012 on Billboard magazine's year end chart, and he also topped the list of their "Top 10 Songwriters Airplay Chart" the same year; he has won four Grammy Awards.

Shellback initially started his career as a heavy metal guitarist before transitioning into pop music production and songwriting.

Shellback regularly collaborates with songwriter Max Martin and together they have produced, written, or co-written songs for various artists such as P!nk, Taylor Swift, Adam Lambert, Britney Spears, Usher, Avril Lavigne, Ariana Grande, Adele and Maroon 5. Shellback has also collaborated with fellow producer Benny Blanco and has produced songs by himself, including "Want U Back" by Cher Lloyd and "Animals" by Maroon 5. He co-wrote and co-produced the song "Can't Stop the Feeling!" along with Martin and Justin Timberlake for the animated film Trolls (2016), earning a nomination for the Academy Award for Best Original Song in 2017.

Life and career

Karl Johan Schuster was born and raised in Karlshamn, Sweden.[citation needed] He started as a drummer in local indie rock bands in Karlshamn, as well as recording all instruments on the 2003 Meriah demo ...Turn Him Your Other Cheek (a strictly black metal recording), before joining the metalcore scene as a vocalist in 2004 for Blinded Colony, with whom he recorded 2005's Promo Demo and 2006's Bedtime Prayers, drawing comparisons to fellow Swedish melodic death metal band In Flames, before leaving in 2007.[citation needed] In 2005, he also performed as a guest musician on the Faith album Sorg.

At the age of 16, Schuster met Max Martin through a mutual friend, Julius Petersson. By that time, according to an interview in the Swedish music magazine Stim-magasinet, Schuster's taste in music was "too cool for school" and he had no interest in pop music whatsoever. Petersson kept sending Schuster's indie rock-death metal demos to Martin, who became curious about what it would sound like if Schuster were to make pop music. So in 2006 Martin invited Schuster to his studio in Stockholm to record a demo with him, and since 2007 Schuster has been signed to Martin's production company Maratone.

Among the first songs Schuster co-wrote with Martin are Pink's 2008 single "So What" and Britney Spears' 2008 single "If U Seek Amy". In 2012 Schuster won the STIM Platinum guitar prize. In 2014, Schuster produced "Problem" alongside Martin and Ilya. In 2015, Shellback collaborated with Swedish hardcore punk band Refused, as he is both a fan of the band's music and friends with the band's drummer, David Sandström. Sandström sent him the versions of the songs "Elektra" and "366" that Refused had recorded with producer Nick Launay, and Shellback replied with his own arrangements of the two songs. Refused frontman Dennis Lyxzen explained in June 2015 that Shellback's versions were "far more Refused than our versions" and "were better" than the Launay-produced versions. The two songs appear on Refused's comeback album Freedom—"Elektra" was released as a single on 27 April 2015—which was released on the label Epitaph Records on 26 June 2015.

Discography

With Meriah

  • ...Turn Him Your Other Cheek (Demo) (2003)

With Blinded Colony

As a guest musician

Production discography

YearTitleArtist and albumCo-writerProducer or co-producer
2008"If U Seek Amy"Britney SpearsCircusY
"I'm Gone I'm Going"Lesley RoyUnbeautifulY
"Boring"PinkFunhouseY
"It's All Your Fault"Y
"So What"Y
2009"Oxygen"Living ThingsHabeas CorpusYY
"Bigger"Backstreet BoysThis Is UsY
"3"Britney SpearsThe Singles CollectionYY
"Quitter"Carrie UnderwoodPlay OnY
"Friday I'll Be Over U"Allison IrahetaJust Like YouYY
"Just Like You"YY
"Outta My Head"Leona LewisEchoYY
"Naked"YY
"Whataya Want from Me"Adam LambertFor Your EntertainmentYY
"If I Had You"YY
2010"Kiss n Tell"KeshaAnimalYY
"Hungover"YY
"Party at a Rich Dude's House"YY
"Dinosaur"YY
"DJ Got Us Fallin' in Love"UsherVersusYY
"Raise Your Glass"Pink – Greatest Hits... So Far!!!YY
"Fuckin' Perfect"YY
"Time Machine"RobynBody TalkYY
2011"Can't Find Entrance"Those Dancing DaysDaydreams & NightmaresYY
"Loser like Me"Glee cast – Glee: The Music, Volume 5YY
"Dancing Crazy"Miranda CosgroveHigh MaintenanceYY
"I'll Survive You"BC Jean – SingleYY
"Back 2 Life"E-Type – SingleYY
"What the Hell"Avril LavigneGoodbye LullabyYY
"Wish You Were Here"YY
"Smile"YY
"I Love You"YY
"I Wanna Go"Britney SpearsFemme FataleYY
"Criminal"YY
"Up n' Down"YY
"Light Up the World"Glee cast – Glee: The Music, Volume 6YY
"Moves like Jagger" (feat. Christina Aguilera)Maroon 5Hands All OverYY
"Beggin' on Your Knees"Victorious cast – VictoriousYY
"No More Secrets"Carolina LiarWild Blessed FreedomYY
"Me and You"YY
"Beautiful People"YY
"King of Broken Hearts"YY
"Salvation"YY
"All That Comes Out of My Mouth"YY
"Want U Back"Cher LloydSticks + StonesYY
"With Ur Love"YY
"Beautiful People"YY
"She Doesn't Mind"Sean PaulTomahawk TechniqueYY
2012"Payphone" (feat. Wiz Khalifa)Maroon 5OverexposedYY
"One More Night"YY
"Doin' Dirt"YY
"Scream"UsherLooking for MyselfYY
"We Are Never Ever Getting Back Together"Taylor SwiftRedYY
"I Knew You Were Trouble"YY
"22"YY
"Slut Like You"P!nkThe Truth About LoveYY
"Your Body"Christina AguileraLotusYY
"Let There Be Love"YY
"Kiss You"One DirectionTake Me HomeY
"Heart Attack"YY
"Nobody Compares"YY
"All That Matters (The Beautiful Life)"KeshaWarriorYY
2013"Release You"Megan & LizLook What You StartedYY
"Easier To Lie"Cassadee PopeFrame by FrameYY
"On a Roll"Icona PopThis Is... Icona PopYY
"That High" (feat. Kelly Rowland)PitbullMeltdownY
2014"Air Balloon"Lily AllenSheezusYY
"I Wish" (feat. T.I.)Cher LloydSorry I'm LateYY
"Just Be Mine"YY
"Dirty Love"YY
"Blind Your Love"YY
"Killing It"YY
"I'm in Love"Ola Svensson – Carelessly YoursYY
"Tonight I'm Yours"YY
"Jackie Kennedy"YY
"Problem" (feat. Iggy Azalea)Ariana GrandeMy EverythingY
"Animals"Maroon 5VYY
"In Your Pocket"YY
"Feelings"YY
"Shoot Love"YY
"Blank Space"Taylor Swift1989YY
"Style"YY
"All You Had to Do Was Stay"Y
"Shake It Off"YY
"Bad Blood"YY
"Wildest Dreams"YY
"How You Get the Girl"YY
"Wonderland"YY
"New Romantics"YY
"Talking Body"Tove LoQueen of the CloudsYY
2015"Bad Blood" (feat. Kendrick Lamar)Taylor Swift – Non-album singleYY
"Elektra"RefusedFreedomYY
"366"YY
"This Summer's Gonna Hurt like a Motherfucker"Maroon 5V (reissue)YY
"The Original High"Adam LambertThe Original HighYY
"Rumors" (feat. Tove Lo)YY
"Evil in the Night"YY
"Run Away with Me"Carly Rae JepsenEmotionYY
"Send My Love (To Your New Lover)"Adele25YY
"Rest Your Love"The VampsWake UpYY
2016"Just Like Fire"PinkAlice Through the Looking GlassYY
"Can't Stop the Feeling!"Justin TimberlakeTrolls: Original Motion Picture SoundtrackYY
"Hair Up"YY
"Still Falling For You"Ellie GouldingBridget Jones's BabyYY
2017"Bon Appétit" (feat. Migos)Katy PerryWitnessYY
"Roulette"YY
"Revenge" (feat. Eminem)PinkBeautiful TraumaYY
"Whatever You Want"YY
"Secrets"YY
"...Ready for It?"Taylor SwiftReputationYY
"Gorgeous"YY
"End Game" (feat. Ed Sheeran & Future)YY
"I Did Something Bad"YY
"Don't Blame Me"YY
"Delicate"YY
"So It Goes..."YY
"King of My Heart"YY
"Dancing with Our Hands Tied"YY
2018"Get Up and Fight"MuseSimulation TheoryYY
2019"I Don't Care" (with Justin Bieber)Ed SheeranNo.6 Collaborations ProjectYY
''Beautiful People'' (feat. Khalid)YY
''Take Me Back to London'' (feat. Stormzy)Y
''Remember the Name'' (feat. Eminem and 50 Cent)YY
''Only Human''Jonas BrothersHappiness BeginsYY
"(Hey Why) Miss You Sometime"P!nkHurts 2B HumanYY
''Glad He's Gone''Tove LoSunshine KittyYY
2020''X''Jonas BrothersXVYY
"Diamonds"Sam SmithLove GoesYY
"Call Me Tonight "Ava MaxHeaven & HellYY
2021"Wildest Dreams (Taylor's Version)"Taylor Swift1989 (Taylor's Version)YY
"I Knew You Were Trouble (Taylor's Version)"Taylor SwiftRed (Taylor's Version)YY
"22 (Taylor's Version)"YY
"We Are Never Ever Getting Back Together (Taylor's Version)"YY
"Message in a Bottle"YY
"Can I Get It"Adele30YY
2023"Eyes Closed"Ed Sheeran-YY
"Blank Space (Taylor's Version)"Taylor Swift1989 (Taylor's Version)Y
"Style (Taylor's Version)"Y
"Shake It Off (Taylor's Version)"Y
"Bad Blood (Taylor's Version)"Y
"How You Get the Girl (Taylor's Version)"Y
"Wonderland (Taylor's Version)"Y
"New Romantics (Taylor's Version)"Y
"Bad Blood (Taylor's Version)" (feat. Kendrick Lamar)Y
2025"The Fate of Ophelia"Taylor SwiftThe Life of a ShowgirlYY
"Elizabeth Taylor"YY
"Opalite"YY
"Father Figure"YY
"Eldest Daughter"YY
"Ruin the Friendship"YY
"Actually Romantic"YY
"Wi$h Li$t"YY
"Wood"YY
"Cancelled!"YY
"Honey"YY
"The Life of a Showgirl" (feat. Sabrina Carpenter)YY

Awards and nominations

AwardYearCategoryRecipientOriginal artist(s)ResultRef.
Academy Awards2017Best Original Song"Can't Stop the Feeling!"Justin TimberlakeNominated
Golden Globe Awards2017Best Original SongNominated
Grammy Awards2012Record of the Year"We Are Never Ever Getting Back Together"Taylor SwiftNominated
2013Album of the YearRedNominated
2014Record of the Year"Shake It Off"Nominated
Song of the YearNominated
2015Album of the Year1989Won
Best Pop Vocal AlbumWon
Record of the Year"Blank Space"Nominated
Song of the YearNominated
2016Album of the Year25AdeleWon
Best Song Written for Visual Media"Can't Stop the Feeling!"Justin TimberlakeWon
"Just Like Fire"PinkNominated
2022Album of the Year30AdeleNominated
2024Best Song Written for Visual Media"Better Place"NSYNCNominated
Hollywood Music in Media Awards2016Best Original Song in an Animated Film"Can't Stop the Feeling!"Justin TimberlakeWon
Best Original Song in a Sci-Fi, Fantasy, Horror Film"Just Like Fire"PinkWon

External links