K'naan Songs: Wavin' Flag (Coca-Cola Celebration Mix) - Bang Bang (feat. Adam Levine) - Is Anybody Out There (feat. Nelly Furtado) - Stop For A Minute (& Keane)
K/DA Songs: POP/STARS
Israel Kamakawiwo'ole
Also known as Bruddah Iz, Bradda IZ
Songs: Over The Rainbow / What A Wonderful World
Peter Kay
Songs: Once Upon a Christmas Song (Geraldine McQueen) - The Winner's Song (Britain's Got the Pop Factor...)
Keith Songs: 98.6
Kelis Songs: Milkshake - Bounce (& Calvin Harris) - Trick Me - Acapella - Lil' Star (feat. Cee-Lo)
Tori Kelly
Songs: Coffee - Hallelujah (Duet Version) (in duet with Jennifer Hudson) - Hallelujah (From Sing movie soundtrack) - Don't You Worry 'bout a Thing (From Sing movie soundtrack) - Colors Of The Wind (We Love Disney)
Kids United
Gloria, Nilusi, Erza Muqoli, Esteban, Carla & Gabriel
Songs: Papaoutai - Mama Africa (feat. Youssou N'Dour & Angélique Kidjo) - Last Christmas - Chante (Love Michel Fugain) - Imagine
The Killers
Brandon Flowers, Dave Keuning, Mark Stoermer & Ronnie Vannucci Jr.
Songs: Mr. Brightside - Human - All These Things That I've Done - Somebody Told Me - When You Were Young
The King and I (musical)
The musical (1951) Richard Rodgers & Oscar Hammerstein II
Gertrude Lawrence & Yul Brynner

Songs: Getting to Know You (Gertrude Lawrence) - I Whistle a Happy Tune (Gertrude Lawrence) - Shall We Dance? (Yul Brenner & Gertrude Lawrence) - I Have Dreamed (Doretta Morrow & Larry Douglas) - Hello, Young Lovers (Gertrude Lawrence)
Evelyn King
Evelyn "Champagne" King
Songs: Love Come Down - Shame
Peter Kingsbery Songs: The Promise You Made (in duet with Anna LaCazio) - Only The Very Best
Kiss
Paul Stanley, Gene Simmons, Tommy Thayer, Eric Singer & Bruno Eng
Songs: I Was Made For Lovin' You - Crazy Crazy Nights - Lick It Up - Detroit Rock City - Forever
Brett Kissel Songs: Damn (feat. Dave Mustaine)
Keira Knightley Songs: Lost Stars (Begin Again)
Kula Shaker Songs: Hush
Kungs Songs: This Girl (Remix) - Don't You Know (feat. Jamie N Commons) - I Feel So Bad (feat. Ephemerals) - More Mess (feat. Olly Murs & Coely)
Kygo
Songs: Higher Love (& Whitney Houston) - Firestone (feat. Conrad) - It Ain't Me (& Selena Gomez) - Firestone (Acoustic) (feat. Conrad (Live)) - Carry On (& Rita Ora)