Keinan Abdi Warsame
Songs: Bang Bang (& Adam Levine) - Wavin' Flag (Coca-Cola Celebration Mix) - Is Anybody Out There (& Nelly Furtado) - Stop for a Minute (& Keane)
K. Maro Songs: Femme Like U (& Nancy Martinez) - Victoire (Shy'm)
Käärijä Songs: Cha cha cha (Eurovision Finland) - Cha cha cha (reggae mix)
Kabouter Plop Songs: De kabouterdans (Ine Blokzijl)
Songs: Area Codes
Paul Kalkbrenner Songs: Sky and Sand (Berlin Calling)
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)
Karol G
Songs: Mi ex tenia razon - TQG (& Shakira) - Amargura - Provenza - Watati (& Aldo Ranks)
Karsu Songs: Je suis malade (& Belle Pérez) - Hollywood Seven (Beste zangers) - Losing You (Beste Zangers)
Katastrofe Songs: Maria
Kavinsky Songs: Nightcall (Drive OST)
Chief Keef
Also known as Keith Farrelle Cozart
Songs: Love Sosa
Paul Kelly
Paul Kelly & The Coloured Girls
Songs: To Her Door - Before Too Long - Leaps and Bounds - Dumb Things - How to Make Gravy
Kensington Songs: Sorry - Uncharted - Heading Up High (& Armin Van Buuren) - Streets - All For Nothing (From Bloedlink movie soundtrack)
From The Muppet Movie movie soundtrack
See also: The Muppets

Songs: The Rainbow Connection
Master KG
Songs: Jerusalema (& Nomcebo Zikode)
The Killers
Brandon Flowers, Dave Keuning, Mark Stoermer & Ronnie Vannucci Jr.
Songs: Mr. Brightside - Somebody Told Me - Human - From Here On Out - Read My Mind
The King and I (musical)
The musical (1951) Richard Rodgers & Oscar Hammerstein II
Gertrude Lawrence & Yul Brynner

Songs: Shall We Dance? (Yul Brenner & Gertrude Lawrence) - Getting to Know You (Gertrude Lawrence) - I Whistle a Happy Tune (Gertrude Lawrence) - Something Wonderful (Dorothy Sarnoff) - Hello, Young Lovers (Gertrude Lawrence)
Evelyn King
Also known as Evelyn "Champagne" King
Songs: I'm in Love - Love Come Down - Shame
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 - Strutter - I Stole Your Love - Rock and Roll All Nite - I Love It Loud
Brett Kissel Songs: Damn (& Dave Mustaine)
Vitor Kley Songs: O Sol
Jana Kramer
Also known as Jana Rae Kramer
Songs: Why Ya Wanna - I Got the Boy - I Won't Give Up - The Story - Whiskey
Krewella Songs: Alive
Kris Kross Amsterdam
Jordy & Sander Huisman, Yuki Kempees
Songs: How You Samba (& Sofía Reyes & Tinie Tempah) - Loop niet weg (& Emma Heesters & Tino Martin) - Vanavond (Uit m'n bol) (& Donnie & Tino Martin) - Vluchtstrook (& Antoon & Sigourney K) - Hij is van mij (& Maan, Tabitha & Bizzey)
KSI Songs: Holiday
Lenny Kuhr Songs: De troubadour (Eurovision Netherland)
Kula Shaker Songs: Hush
Kult Songs: Baranek
Kutless Songs: Run
Kwabs Songs: Walk
Benoît Poher, Florian Dubos, Nicolas Chassagne & Fabien Dubos
Songs: Dernière danse (feat. Cœur de pirate) (& Cœur de pirate) - Dernière danse - XY - Le chemin (& Sita) - C'est ma faute