La La Land
Musical film (2016)
Songs: City of Stars - Audition (The Fools Who Dream) (Emma Stone) - Another Day of Sun - Start a Fire (John Legend) - A Lovely Night (Ryan Gosling & Emma Stone)
Lady And The Tramp
Musical film (1955) Disney - Oliver Wallace & Peggy Lee
See also: Lady and the Tramp II: Scamp's Adventure

Songs: What a Dog/He's a Tramp - Bella Notte (Oliver Wallace) - The Siamese Cat Song - Belle nuit - La chanson des siamois
Laid Back Songs: Sunshine Reggae - White Horse - Bakerman (feat. Hanne Boel)
Greg Lake
member of King Crimson and Emerson, Lake & Palmer
Songs: I Believe In Father Christmas
Amy Lee Songs: Broken (in duet with Seether)
Swae Lee
Songs: Sunflower (& Post Malone) - Sicko Mode (feat. Drake, Travis Scott & Big Hawk) - Close to Me (feat. Ellie Goulding & Diplo)
Lemonade Mouth
Music from the Motion Picture - Disney
Songs: More Than A Band - Determinate - She's So Gone - Somebody
Les Misérables
Musicals & Broadway - Broadway
Songs: I Dreamed A Dream (Patti LuPone) - Stars - On My Own (Movie Version) (Samantha Barks) - On My Own - Bring Him Home
Adam Levine Songs: Lost Stars - Locked Away (feat. R. City)
Lil' Jon Songs: Yeah! (& Usher & Ludacris) - Turn Down For What (& DJ Snake) - Do You Remember (feat. Jay Sean & Sean Paul) - Get Low (feat. The Eastside Boyz & Ying Yang Twins) - Lovers and Friends
Linkin Park
Chester Bennington, Mike Shinoda, Brad Delson, Rob Bourdon, Joe Hahn & Dave « Phoenix » Farrell
Songs: Numb - In the End - One More Light - Leave Out All the Rest - One Step Closer
A Little Night Music
Musicals & Broadway
Songs: Send In The Clowns
Lizzo
Melissa Jefferson
Songs: Good As Hell - Juice - Boys - Truth Hurts - Tempo (feat. Missy Elliott)
Lloyd Songs: Dedication To My Ex (Miss That) (feat. André 3000 & Lil Wayne) - Southside (feat. Ashanti) - Get It Shawty - You (feat. Lil Wayne)
Cher Lloyd Songs: Swagger Jagger - With Ur Love (feat. Mike Posner) - Human - Oath (feat. Becky G) - I Wish (feat. T.I.)
LMFAO
Redfoo (Stefan Gordy) & Sky Blu (Skyler Gordy)
Songs: Party Rock Anthem (feat. Lauren Bennett & Goon Rock) - Sexy And I Know It - Sorry For Party Rocking - Shots (feat. Lil' Jon) - Let The Bass Kick In Miami Girl (& DJ Chuckie)
Sasha Lopez Songs: All My People (& Broono & Andreea D)
The Lord of the Rings
Music from the Motion Picture
Songs: Into The West (Annie Lennox) - Adiemus (Enya) - May It Be (Enya)
Loreen Songs: Euphoria (Eurovision Sweden)
Helmut Lotti Songs: Amazing Grace - Eso Beso (& Golden Symphonic Orchestra)
Camille Lou Songs: Au diable - Self Control - La Belle et la Bête (in duet with Garou) - Le temps s'en va (& Matthieu Carnot) - Il est temps (& Charlie Boisseau)
Loud Luxury Songs: Body (feat. Brando)
LP
Laura Pergolizzi
Songs: Recovery - Lost On You - Muddy Waters - Strange - Don't Let Me Down (Live)
LSD Songs: Thunderclouds (Labrinth, Sia & Diplo)
LunchMoney Lewis Songs: Bills - Give Love (feat. Andy Grammer) - Green Light (feat. Flo Rida & Pitbull) - Whip It! (feat. Chloe Angelides) - I Love Me (feat. Meghan Trainor)
Lustra
Chris Baird, Nick Cloutman, Jason Adams & Bruce Fulford
Songs: Scotty Doesn't Know (EuroTrip)
Kevin Lyttle Songs: Turn Me On (feat. Spragga Benz)