- 3x3cute (music producer)
- 3xBlast
- 3xbravo
- 3XM (Manuel Reuter, Manuel Schleis, Markus Beilke)
- 3xperimental
- 3YE
- 3Yo
- 4 AM
- 4 Bajo Zero
- 4 by Four
- 4 Cats
- 4 Circles (Nikita Vasilyev)
- 4 Clubbers
- 4 Corners feat. Ladi6
- 4 de la Torre, Los
- 4 Door Theater (US alt / pop)
- 4 Elements
- 4 For Fall
- 4 Fun (Dutch boy band)
- 4 Golfers
- 4 Grandes del Norte, Los
- 4 Idiots
- 4 In Action
- 4 in Love
- 4 in tha Chamber
- 4 Non Blondes
- 4 of Us, The (Northern Irish band)
- 4 Out of 5 Doctors
- 4 P.M. (R&B quartet from Baltimore)
- 4 People
- 4 Promille
- 4 Reeel
- 4 Rumbos, Los
- 4 Runner
- 4 Strings (Netherlands dance duo)
- 4 Strings & Burton, Cathy
- 4 Strings & Day, Fenna
- 4 Strings & Fabio, van, Mike
- 4 Strings & Fridolijn
- 4 Strings & Gallagher, Audrey
- 4 Strings & Heath, Katty
- 4 Strings & Rivera, Denise
- 4 Strings & Sue McLaren
- 4 Strings & Teutenberg, Susanne
- 4 Strings & Thetford, Jessie Lee
- 4 Strings feat. Burton, Cathy
- 4 Strings feat. Cousins, Tina
- 4 Strings feat. Criado, Ana
- 4 Strings feat. Fridolijn
- 4 Strings feat. Gallagher, Audrey
- 4 Strings feat. Janson Lunar
- 4 Strings feat. K, Kaimo feat. Teutenberg, Susanne
- 4 Strings feat. Kennedy, Neev
- 4 Strings feat. Lawson, Ellie
- 4 Strings feat. Lumiere, Eric
- 4 Strings feat. Sphere
- 4 Strings feat. Sue McLaren
- 4 Strings feat. Teutenberg, Susanne
- 4 Strings feat. Thetford, Jessie Lee
- 4 Strings feat. Trance Classics feat. Lawson, Ellie
- 4 Strings ft. Cousins, Tina
- 4 Strings, K, Kaimo & Teutenberg, Susanne
- 4 Strings, Trance Classics, Lawson, Ellie & Sherif, Omar
- 4 the Cause
- 4 to the Bar (German lounge/latin/jazz quartet)
- 4 to the Bar (garage house ("Slam Me Baby" feat. Alexis P. Suter))
- 4 Trinity (Christian music rap group)
- 4 Tune Fairytales
- 4 United (has song "Don't Close Your Eyes")
- 4 Villains
- 4 Wings
- 4 Zimmer Küche Bad
- 4-2-4 (football anthems)
- 4-4-2
- 4-Kuma
- 4‐ize (US hip‐hop artist)
- 4‐Skins, The
- 4. (Rappeur français)
- 4.9.0 Friedhof Chiller (German HipHop Trio / NOT the "4.9.0 Clizzic" Group)
- 4.9.0 Friedhof Chiller, Basstard, Schlafwandler & Sicc
- 4.9.0 Friedhof Chiller, Schlafwandler, Sicc & Okunorobo, Jayson
- 4.9.0 Friedhof Chiller, Sicc, Schlafwandler & Okunorobo, Jayson
- 4*
- 4*TOWN (fictional band)
- 4*Town, Fisher, Jordan, Finneas, Levi, Josh, Ngo, Topher & Villanueva, Grayson
- 40 Below Summer
- 40 Cal.
- 40 Cal. feat. Writer, J.R.
- 40 Fingers
- 40 Glocc
