M.I.A. Songs: Paper Planes - XXXO (feat. Jay-Z)
M83 Songs: Oblivion (feat. Susanne Sundfør) - Midnight City
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: Same Love (feat. Mary Lambert) - Downtown - Thrift Shop - Can't Hold Us (feat. Ray Dalton) - White Walls (feat. Schoolboy Q & Hollis)
Madcon Songs: Beggin' - Don't Worry (feat. Ray Dalton)
Maejor Songs: I Love You (feat. Greeicy) - Lolly (feat. Justin Bieber & Juicy J)
Juan Magán Songs: Noche y de día - Un momento (& Inna) - Bailando Por Ahi (Ayer la vi) - Baila Conmigo (feat. Luciana) - Ni la hora (& Ana Guerra)
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 ?)
Mario
Mario Dewar Barrett
Songs: Let Me Love You - Just a Friend - Thinkin' About You - Kryptonite (feat. Rich Boy)
Maroon 5
Adam Levine, James Valentine, Jesse Carmichael, Michael Madden, Matt Flynn & Ryan Dusick
Songs: Memories - Sugar - Sunday Morning - Girls Like You - This Love
Bruno Mars
Peter Hernandez
Songs: Uptown Funk (feat. Mark Ronson) - Count On Me - Marry You - Treasure - 24K Magic
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: I'm Leaving it Up to You - What a Crying Shame - Pretend - Dance the Night Away - Pizziricco
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: Happy Feelin's (feat. Frankie Beverly) - Joy And Pain - Before I Let Go (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: 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)
Maria Mckee Songs: Show Me Heaven (Days of Thunder)
Loreena McKennitt Songs: The Mummers' Dance (Single Version)
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)
Idina Menzel
Songs: Show Yourself (From Frozen 2 movie soundtrack) - Into the Unknown (& Aurora) - Let It Go (Frozen) - For Good (From Wicked (musical) musical) - For The First Time In Forever (& Kristen Bell)
Merk & Kremont Songs: Hands Up (feat. DNCE)
Metallica
James Hetfield, Lars Ulrich, Kirk Hammett & Robert Trujillo
Songs: Nothing Else Matters - Enter Sandman - Whiskey In The Jar - For Whom The Bell Tolls - Master of Puppets
Migos
Songs: Bad and Boujee (feat. Lil Uzi Vert) - T-Shirt - MotorSport (feat. Nicki Minaj & Cardi B)
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)
Miss Saigon
Musicals & Broadway (1989)
Claude-Michel Schoenberg & Alain Boublil

Songs: Why, God, Why? - Sun and Moon - Now That I've Seen Her - I'd Give My Life For You - The Last Night of the World
Models Songs: Fame
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) - Nights in White Satin (Album Version) - The Story In Your Eyes - I'm Just a Singer (In a Rock and Roll Band) - Question
Wolfgang Amadeus Mozart Songs: Voi che sapete (le Mariage de Figaro) - Ave verum corpus
Mr. Big
Eric Martin, Paul Gilbert, Billy Sheehan & Pat Torpey
Songs: To Be With You - Wild World - Just Take My Heart
Muse
Matthew Bellamy, Dominic Howard & Christopher Wolstenholme
Songs: Starlight - Feeling Good - Hysteria - Time is Running Out - Undisclosed Desires