M83 Songs: Midnight City - Oblivion (feat. Susanne Sundfør)
Macklemore
See also: Macklemore & Ryan Lewis
Songs: These Days - And We Danced (feat. Ziggy Stardust) - Glorious (feat. Skylar Grey) - Good Old Days (feat. Kesha)
Macklemore & Ryan Lewis Songs: Can't Hold Us (feat. Ray Dalton) - Thrift Shop - Same Love (feat. Mary Lambert) - Downtown - White Walls (feat. Schoolboy Q & Hollis)
Madcon
Also known as Mad Conspiracy
Tshawe Baqwa - Kapricon & Yossef Wolde-Mariam

Songs: Beggin' - Don't Worry (feat. Ray Dalton) - Glow - Liar
Malo Songs: Suavecito
Cheb Mami Songs: Desert Rose (& Sting) - Meli Meli (Que m'arrive-t-il ?) - Ma Ma (Dance Mix)
Maroon 5
Adam Levine, James Valentine, Jesse Carmichael, Michael Madden, Matt Flynn & Ryan Dusick
Songs: Memories - This Love - Sugar - She Will Be Loved - Girls Like You
Marshmello
Songs: Silence (feat. Khalid) - Friends (feat. Anne-Marie) - Here With Me (feat. Chvrches) - Happier (feat. Bastille) - Wolves (feat. Selena Gomez)
Massive Attack Songs: Teardrop (feat. Elizabeth Fraser) - Live with Me (Terry Callier)
The Mavericks
Raul Malo, Robert Reynolds, Paul O'Rourke, Eddie Deakin, Mitchell Quinn, David Lee Holt, Nick O'Kane, Ben Peeler & Ashley Price
Songs: Dance the Night Away - All You Ever Do Is Bring Me Down - Are You Sure Hank Done it This Way - World Without Love - Are You Lonesome Tonight
MAX Songs: Love Me Less (feat. Quinn XCII) - Lights Down Low (feat. Gnash)
Edward Maya Songs: Stereo Love (feat. Vika Jigulina) - This Is My Life (feat. Vika Jigulina)
Maze Songs: Before I Let Go (feat. Frankie Beverly) - Joy And Pain - Happy Feelin's (feat. Frankie Beverly) - Golden Time Of Day (feat. Frankie Beverly)
Zayion McCall Songs: Juju on That Beat (TZ Anthem) (& Zay Hilfigerrr)
Jim McCann
Songs: Grace
China Anne McClain Songs: Calling All The Monsters (From A.N.T. Farm) - Dynamite (From A.N.T. Farm)
The McCoys Songs: Hang On Sloopy (Single Version)
Maria Mckee
Songs: Show Me Heaven (Days of Thunder)
Gerard McMann Songs: Cry Little Sister (The Lost Boys)
Mean Girls
The musical (Broadway Cast)
Songs: Sexy - I'd Rather Be Me - I See Stars - Someone Gets Hurt - Apex Predator
Meduza Songs: Piece of Your Heart (feat. Goodboys)
Megadeth Songs: Symphony Of Destruction - Moto Psycho (Alternative Outro) - Angry Again
Melanie C
Melanie Chisholm Also known as Mel C
See also: Spice Girls

Songs: When You're Gone (in duet with Bryan Adams) - First Day of My Life - If That Were Me - Yeh Yeh Yeh - I Turn To You
Merk & Kremont Songs: Hands Up (feat. DNCE)
Metallica
James Hetfield, Lars Ulrich, Kirk Hammett & Robert Trujillo
Songs: Nothing Else Matters - Wherever I May Roam - Enter Sandman - Whiskey In The Jar - Hardwired
MGMT
The Management
Songs: Kids - Time to Pretend - Electric Feel
Migos Songs: Bad and Boujee (feat. Lil Uzi Vert) - MotorSport (feat. Nicki Minaj & Cardi B) - T-Shirt
John Miles Songs: Music (Was My First Love) - Try A Little Tenderness (live Wembley) (in duet with Tina Turner)
Military Wives Choir
Songs: Sing (& Gary Barlow & The Commonwealth Band) - Wherever You Are (X Factor)
Milk & Honey Songs: Hallelujah (& Gali Atari) - Hallelujah (הללויה Hebrew version) (& Gali Atari)
Nicki Minaj
Songs: Bang Bang - Beauty And A Beat (& Justin Bieber) - Beez In The Trap (feat. 2 Chainz) - Swalla (feat. Jason Derulo & Ty Dolla $ign) - Woman Like Me (& Little Mix)
Miss Saigon
Musicals & Broadway (1990)
Claude-Michel Schoenberg & Alain Boublil

Songs: The Last Night of the World - Bui Doi - The Movie In My Mind - I'd Give My Life For You - Why, God, Why?
MK Songs: 17 - Always (Route 94 Remix) (feat. Alana)
Janelle Monáe Songs: We Are Young (& Fun) - What Is Love? (From Rio 2 movie soundtrack) - Tightrope (feat. Big Boi) - Make Me Feel
Monsters, Inc. Songs: If I Didn't Have You - Si je ne t'avais pas (Eric Métayer & Jacques Frantz)
Morecambe and Wise
Eric Morecambe & Ernie Wise
Songs: Bring Me Sunshine - Positive Thinking
Mousse T.
Songs: Sex Bomb (& Tom Jones) - Is It 'Cos I'm Cool? (feat. Emma Lanford) - Let's Go To Bed (& No Angels)
Wolfgang Amadeus Mozart Songs: Ave verum corpus - Voi che sapete (le Mariage de Figaro) - Non so più cosa son, cosa faccio (Le nozze di Figaro)
Mundy Songs: Galway Girl (feat. Sharon Shannon) - July
Muse
Matthew Bellamy, Dominic Howard & Christopher Wolstenholme
Songs: Feeling Good - Unintended - Bliss - Plug In Baby - Knights of Cydonia
Music and Lyrics Songs: Way Back Into Love (Hugh Grant & Drew Barrymore)