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

Songs: Don't Worry (feat. Ray Dalton) - Beggin'
Maejor Songs: I Love You (feat. Greeicy) - Lolly (feat. Justin Bieber & Juicy J)
Major Lazer
Songs: Cold Water (feat. Justin Bieber & ) - Que calor (feat. J Balvin & El Alfa) - Lean On (feat. & DJ Snake) - Powerful - Let Me Live (& Rudimental, Anne-Marie & Mr Eazi)
Lee Majors Songs: The Unknown Stuntman (The Fall Guy)
Malo Songs: Suavecito
Cheb Mami Songs: Desert Rose (& Sting) - Meli Meli (Que m'arrive-t-il ?)
Maroon 5
Adam Levine, James Valentine, Jesse Carmichael, Michael Madden, Matt Flynn & Ryan Dusick
Songs: Memories - Sunday Morning - Girls Like You - Sugar - This Love
Massive Attack Songs: Teardrop (feat. Elizabeth Fraser)
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 - Something Stupid - Things You Said To Me - There Goes My Heart
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
feat. Frankie Beverly
Songs: Before I Let Go (feat. Frankie Beverly) - Happy Feelin's (feat. Frankie Beverly) - Golden Time Of Day (feat. Frankie Beverly) - Joy And Pain
Zayion McCall Songs: Juju on That Beat (TZ Anthem) (& Zay Hilfigerrr)
Jim McCann Songs: Grace
China Anne McClain Songs: Dynamite (From A.N.T. Farm) - Calling All The Monsters (From A.N.T. Farm)
Marilyn McCoo
Songs: You Don't Have To Be A Star (in duet with Billy Davis Jr.)
The McCoys Songs: Hang On Sloopy (Single Version)
Leah McFall Songs: I Will Survive (Live)
Maria Mckee Songs: Show Me Heaven (Days of Thunder)
Gerard McMann Songs: Cry Little Sister (The Lost Boys)
Medina Songs: You And I
Meduza Songs: Lose Control (& Becky Hill & Goodboys) - Piece of Your Heart (feat. Goodboys)
John Mellencamp
John Cougar Mellencamp
Songs: Hurts So Good (From Footloose (1984 film) movie soundtrack) - Jack & Diane - R.O.C.K. in the U.S.A. - Cherry Bomb - Pink Houses
Idina Menzel
Songs: Into the Unknown (& Aurora) - Show Yourself (From Frozen 2 movie soundtrack) - For The First Time In Forever (& Kristen Bell) - Let It Go (Frozen) - For Good (From Wicked (musical) musical)
Merk & Kremont Songs: Hands Up (feat. DNCE)
Metallica
James Hetfield, Lars Ulrich, Kirk Hammett & Robert Trujillo
Songs: Whiskey In The Jar - Turn The Page
Migos Songs: Bad and Boujee (feat. Lil Uzi Vert) - MotorSport (feat. Nicki Minaj & Cardi B) - T-Shirt
Miguel
Miguel Jontel Pimentel
Songs: Adorn - Remind Me to Forget (feat. Kygo) - Power Trip (& J. Cole) - Sure Thing - Beautiful (& Mariah Carey)
John Miles Songs: Music (Was My First Love) - Try A Little Tenderness (live Wembley) (in duet with Tina Turner)
Milk & Honey Songs: Hallelujah (& Gali Atari)
Miss Saigon
Musicals & Broadway (1989)
Claude-Michel Schoenberg & Alain Boublil

Songs: Now That I've Seen Her - The Last Night of the World
MKTO
Tony Oller & Malcolm David Kelley
Songs: Classic - Thank You - God Only Knows
Models Songs: Fame
Monifah Songs: Touch It
Monsters, Inc. Songs: If I Didn't Have You - Si je ne t'avais pas (Eric Métayer & Jacques Frantz)
Sara Montiel Songs: Quizás, Quizás, Quizás (From Noches de Casablanca movie soundtrack)
The Moody Blues
Graeme Edge, Justin Hayward, John Lodge, Denny Laine, Mike Pinder, Ray Thomas, Clint Warwick, Rodney Clark, Patrick Moraz
Songs: Nights in White Satin (Single Version) - I'm Just a Singer (In a Rock and Roll Band) - Question - Nights in White Satin (Album Version) - Tuesday Afternoon
Alain Morisod Songs: River Blue (& Sweet People) - Une chanson italienne (& Sweet People) - Adieu et bonne chance (& Sweet People) - Le marchand de bonheur (& Sweet People)
Wolfgang Amadeus Mozart Songs: Voi che sapete (le Mariage de Figaro)
Mr. Big
Eric Martin, Paul Gilbert, Billy Sheehan & Pat Torpey
Songs: Wild World - To Be With You - Just Take My Heart
Muse
Matthew Bellamy, Dominic Howard & Christopher Wolstenholme
Songs: Time is Running Out - Feeling Good - Explorers - The Handler - Hysteria