K'naan
Keinan Abdi Warsame
Kappaleet: Wavin' Flag (Coca-Cola Celebration Mix) - Stop For A Minute (& Keane) - Bang Bang (saavutus. Adam Levine) - Is Anybody Out There (saavutus. Nelly Furtado)
Kana
Kappaleet: Plantation
Tapani Kansa
Kappaleet: Delilah
Katy B
Katie Brien
Kappaleet: What Love is Made Of - Crying For No Reason - Lights On (saavutus. Ms. Dynamite) - Broken Record - Anywhere In The World (& Mark Ronson)
Kelis
Kappaleet: Get Along With You - Acapella - Milkshake - Millionaire (saavutus. André 3000) - Trick Me
Matt Kennon Kappaleet: The Call
Kesha
KE$HA
Kappaleet: Take It Off - Right Round (saavutus. Flo Rida) - TiK ToK - Raising Hell (saavutus. Big Freedia) - Dirty Picture (& Taio Cruz)
Wiz Khalifa
Kappaleet: Roll Up - See You Again (saavutus. Charlie Puth) - Shell Shocked (saavutus. Kill the Noise & Madsonik) - Til I'm Gone (& Tinie Tempah) - Young, Wild & Free (& Snoop Dogg)
Kids United
Gloria, Nilusi, Erza Muqoli, Esteban, Carla & Gabriel
Kappaleet: Comme un fils (saavutus. Corneille) - Eblouie par la nuit - Sauver l'amour (& Hélène Ségara) - Des ricochets - Yalla (saavutus. Amir)
Kiiara Kappaleet: Heavy (& Linkin Park)
The Killers
Brandon Flowers, Dave Keuning, Mark Stoermer & Ronnie Vannucci Jr.
Kappaleet: Mr. Brightside - The Man - For Reasons Unknown - Somebody Told Me - Tranquilize (saavutus. Lou Reed)
Kiss
Paul Stanley, Gene Simmons, Tommy Thayer, Eric Singer & Bruno Eng
Kappaleet: Crazy Crazy Nights - Rock and Roll All Nite - Beth - Heaven's On Fire - Firehouse
Keira Knightley
Kappaleet: Lost Stars (Begin Again)
Ari Koivunen
Idols 2007
Kappaleet: Angels Are Calling
Paweł Kukiz
Kappaleet: Jańcio (& Patrycja Gola)
Kungs
Kappaleet: This Girl (Remix) - Don't You Know (saavutus. Jamie N Commons) - I Feel So Bad (saavutus. Ephemerals) - More Mess (saavutus. Olly Murs & Coely)
Kyo
Benoît Poher, Florian Dubos, Nicolas Chassagne & Fabien Dubos
Kappaleet: XY - Le chemin (duetto Sita kanssa) - Dernière danse - Les lois de l'attraction (saavutus. Madame Monsieur) - Contact