K'naan Songs: Wavin' Flag (Coca-Cola Celebration Mix) - Bang Bang (& Adam Levine) - Is Anybody Out There (& Nelly Furtado)
La K'onga Songs: Fama de diabla (& David Bisbal & Emanero)
K. Maro
Songs: Femme Like U (& Nancy Martinez) - Victoire (Shy'm)
Brenda K. Starr
Also known as Brenda Joy Kaplan
Songs: I Still Believe (English version)
Käärijä Songs: Cha cha cha (Eurovision Finland) - Cha cha cha (reggae mix)
Kaaris Songs: Tchoin - Kalash (& Booba) - Zoo
Kabin Crew Songs: The Spark (& Lisdoonvarna Crew)
Bart Kaëll
Also known as Bart Gyselinck
Songs: Zeil je voor het eerst (remix) (& Dorothee Vegas & Like Maarten) - De Marie Louise
Kal Ho Naa Ho (film) Songs: Kal ho naa ho (Sonu Nigam)
Kaleen Songs: We Will Rave (Eurovision Austria)
Kali Songs: Area Codes
Kalush Orchestra Songs: Stefania (Eurovision Ukraine)
Kamelot Songs: The Haunting (Somewhere in Time) (& Simone Simons)
Kana Songs: Plantation
Kaolin Songs: Partons vite (si tu veux bien) - Je reviens
Avi Kaplan
Also known as Avriel Benjamin Kaplan
See also: Pentatonix

Songs: Change on the Rise - Ring of Fire (& Home Free)
Kavinsky Songs: Nightcall (Drive OST)
Peter Kay Songs: Once Upon a Christmas Song (Geraldine McQueen)
Also known as Kevin Elijah Burgess
Songs: Church Clap (& Lecrae)
Keiino Songs: Spirit in the Sky (Eurovision Norway)
Keith Songs: 98.6
Paul Kelly
Paul Kelly & The Coloured Girls
Songs: Darling It Hurts (& The Coloured Girls) - To Her Door - Dumb Things - Leaps and Bounds - How to Make Gravy
Tori Kelly
Songs: Don't You Worry 'bout a Thing (From Sing movie soundtrack) - Hallelujah (From Sing movie soundtrack) - Hallelujah (duet) (& Jennifer Hudson) - Hollow - Colors of the Wind (We Love Disney)
Kensington Songs: Sorry - Streets - Heading Up High (& Armin Van Buuren) - All For Nothing (From Bloedlink movie soundtrack) - Uncharted
Songs: This Is Me - Woman (& The Dap-Kings Horns) - This Is Me (The Reimagined Remix) (& Keala Settle & Missy Elliott) - Praying - TiK ToK
Master KG
Songs: Jerusalema (& Nomcebo Zikode)
The Killers
Brandon Flowers, Dave Keuning, Mark Stoermer & Ronnie Vannucci Jr.
Songs: Mr. Brightside - All These Things That I've Done - Somebody Told Me - Human - Read My Mind
The King and I (musical)
The musical (1951) Richard Rodgers & Oscar Hammerstein II
Gertrude Lawrence & Yul Brynner

Songs: Hello, Young Lovers (Gertrude Lawrence) - Getting to Know You (Gertrude Lawrence) - I Have Dreamed (Doretta Morrow & Larry Douglas) - Something Wonderful (Dorothy Sarnoff) - I Whistle a Happy Tune (Gertrude Lawrence)
Evelyn King
Also known as Evelyn "Champagne" King
Songs: I'm in Love - Love Come Down - Shame
The Kingdom Choir
Karen Gibson
Songs: Stand by Me
Noa Kirel (נועה קירל) Songs: Unicorn (Eurovision Israel)
Paul Stanley, Gene Simmons, Ace Frehley, Tommy Thayer, Eric Singer & Bruno Eng
Songs: I Was Made For Lovin' You - Every Time I Look at You - Hide Your Heart - 2000 Man - Creatures of the Night
Brett Kissel Songs: Damn (& Dave Mustaine)
Kovacs Songs: My Love
Jana Kramer
Also known as Jana Rae Kramer
Songs: I Got the Boy - Why Ya Wanna - Whiskey - Voices - The Story
DJ Kreayshawn
Songs: Gucci Gucci
Kris Kross Amsterdam
Jordy & Sander Huisman, Yuki Kempees
Songs: Vanavond (Uit m'n bol) (& Donnie & Tino Martin) - Loop niet weg (& Emma Heesters & Tino Martin) - How You Samba (& Sofía Reyes & Tinie Tempah) - Vluchtstrook (& Antoon & Sigourney K) - Hij is van mij (& Maan, Tabitha & Bizzey)
KRN Songs: Les anges
Also known as Lawrence Kris Parker
Songs: Sound of Da Police - Radio Song (& R.E.M.)
KSI Songs: Holiday
Lenny Kuhr Songs: De troubadour (Eurovision Netherland)
Kula Shaker Songs: Hush
Kult Songs: Baranek
Kwabs Songs: Walk
Kyle Songs: iSpy (& Lil Yachty)
Benoît Poher, Florian Dubos, Nicolas Chassagne & Fabien Dubos
Songs: Le chemin (& Sita) - Dernière danse - Je saigne encore - Le Graal - Dernière danse (feat. Cœur de pirate) (& Cœur de pirate)