From my second Grooveshark Account, in alphabetical order:

- 2 Guys
- 2 In a Room
- 2 Live Crew
- 69 Boyz
- Aiza Seguerra
- Akemi Kimura
- Alesha Dixon
- Ali & Gip
- Alkaline Trio
- Amon Tobin
- Amen
- Anastacia
- Anberlin
- Andreas Johnson
- Aretha Franklin
- Art of Trance
- Atif Aslam & Alisha Chinoy
- Avril Lavigne
- Baby Boo
- Baby D & DJ Scott Henry
- Backstreet Boys
- Barbie Young
- Barenaked Ladies
- BassHunter
- Beatdrop & MC Mouse the Mighty
- Beenie Man
- Belmond & Parker
- Ben Folds Five
- Benni Benassi
- Berlin
- Better Than Ezra
- Billy Currington
- Black Eyed Peas
- Bob Sinclair
- Boney M
- Box Car Racer
- Boyz II Men
- Brian McNight
- Brittney Spears
- Brother Cane
- Brother Grim
- Brown Eyed Girls
- Buck Cherry
- Buckethead
- Buckwheat Zydeco
- Butch Walker
- CAKE
- Captain Jack
- Carl Carlton
- Carlos Gardel
- Carol Medina
- Cee Lo Green
- Chanel
- Chazz (featuring Coolio)
- Chip Man & The Buckwheat Boyz
- Christina Aguilerra
- Chumbawumba
- Clubasse
- Coldplay
- Collective Soul
- Corona
- Counting Crows
- Craig David
- Crazy Frog
- Creedance Clearwater Revival
- Crystal Waters
- Culture Beat
- Cupid
- Daft Punk
- Dance Dance Revolution (well the songs from the games.)
- Daniel Beddingfield
- Danity Kane
- Darude
- Dave Mathew's Band
- Dee Dee Sharp
- Def Squad
- Default
- Deloris & The Ronelles
- Deniz Koyu
- Devendra Banhart
- Diana Ross & The Supremes
- Dicky Betts
- Digable Planets
- Digimon (Yes, there is a group called that)
- Digital Underground
- Dio
- Disco Rick & The Wolfpack
- Diverse Kunstnere
- DJ Rupture
- DJ Astrix
- DJ Chip Man & Ray Lo
- DJ Kizzy Rock
- DJ Magic Mike
- DJ Shadow
- DJ Xtreme
- Don Cartel
- Dr. Albain
- Dr. Dre
- Dr. Reanimator
- Duncan Sheik
- Easter Egg
- Eddie Grant
- Edward Maya
- Ekolu
- El DeBarge
- Ella Fitzgerald
- Elton John
- Elvis vs. JXL
- Estelle
- Etta James
- Everclear
- Fade
- Far East Movement
- Fastball
- Feist
- Fergie
- Fila Brazillia
- Five Finger Death Punch
- Flo Rida
- Florence and the Machine
- Foo Fighters
- Freak Nasty
- Fred Bennedetti & Peter Puppi
- Fundamental Sounds
- G-Netic
- George Benson
- Geri Halliwell
- Gina G
- Good Charloette
- Goo Goo Dolls
- Grand Theft Audio
- Gundam Wing
- Guster
- Hanson
- Harold Faltermeyer
- Hello Goodbye
- Herbie Hancock
- Hermes House Band
- Hiroshi Yamaguchi
- Hootie & The Blowfish
- Hot Action Cop
- Howie Day
- Howlin Wolf
- Hewie Lewis & The News
- Hydeki Naganuma
- Ida Corr
- Ikimono Gakari
- INOJ
- Inoue Joe
- Jay Giles
- J.K.
- Jacky Cheung and Kelly CHan
- Jaffa
- Jamie Cullum
- Jamie O'Neal
- Janelle Monae
- Janet Jackson
- Jay Chou
- Jennifer Hudson
- Jimmy Eat World
- John Mayer
- John Powell
- John Williams
- Josh Groban
- Jr. Walker & The Allstars
- Justin Moore
- K T Oslin
- Karl Wolf
- Katy Perry
- Kelly Chan Wai Lam
- Kelly Clarkson
- Kelly Pease & Servant Singers
- Keri Hilson
- Killing Heidi
- Kilo Ali
- King Black Acid
- Kirk Franklin
- Kumbia Kings
- La Bouche
- Lauryn Hill
- Lazlo Bane
- LeAnn Rimes
- Leroy Hutson
- Lloyd
- LMC vs U2
- Los Acosta
- Los Lobos & Antonio Banderas
- Los Lonely Boys
- Luke
- Luscious Jackson
- Lykke Li
- Macy Gray
- Madonna
- Maldita Vacindad
- Mange Schmidt
- Mariah Carey
- Mark Mancina
- Maroon 5
- Martha Reeves & The Vandellas
- Marvin Berry
- Marvin Gaye
- Mary J. Blige
- Mat Kearney
- Matchbox 20
- Michael Buble
- Michael Jackson
- MIKA
- Mint Condition
- Moloko
- Motohiro Hata
- Motorhead
- Murphy Brown vs Captain Hollywood
- My Chemical Romance
- Nana Starring Mika Nakashima
- Nelly
- Nelly Furtado
- New Found Glory
- New Radicals
- Nina Simone
- Oh No
- OutKast
- Panic! At The Disco
- Paul Simon
- Pet Shop Boys
- Petula Clark
- Phoenix
- Pink
- (who sang He's A Pirate from Pirates of the Carribean: Curse Of The Black Pearl?)
- Pitbull
- Plain White Tees
- Pussycat Dolls
- Quad City DJs
- Queen
- Queen & David Bowie
- Queen Latifah
- Question
- R Kelly featuring Swizz Beatz
- R.E.M.
- Ray Charles
- Real McCoys
- Reba McEntire
- Revolution Void
- Ricky Martin
- Rhianna
- Robert Palmer
- Roberta Flack
- Rod Stewart
- Rolls Royce
- RUSH
- Ruth Pointer
- Rx Bandits
- S Club 7
- Salt N Peppa
- Sam Sneed
- Sanctus Real
- Santana
- Santogold
- Saving Abel
- Scissor Sisters
- S-Cry-Ed
- Sean Hays
- Shaggy
- Shania Twain
- Shane Ward
- Shinedown
- Shinobu Tanaka & Kenta Nagata
- Shirley Bassey
- Shirley Horn
- Show Luo
- Sir Mix-A-Lot
- Sister Hazel
- Skyrocket Love
- Smash Mouth
- Snap!
- Snoop Dog
- Son of Raw
- Songbird
- Sonique
- Spank Spank
- Spice Girls
- Splack Pack
- Studio 45
- Sugar Hill Gang
- Summer Channel
- Supercell
- Tag Team
- Textual
- The Fifth Dimension
- The Asteroids Galaxy Tour
- The B-52's
- The Birds And The Bees
- The Cranberries
- The Dodos
- The Escape Club
- The Format
- The Game
- The Gin Blossoms
- The Killers
- The Notorious B.I.G.
- The Offspring
- The Postal Service
- The Rembrandts
- The Tokens
- The Who
- Tim McGraw
- Tito Nieves
- Toby Keith
- Todd Rundgren
- Todd Snider
- Ton Loc
- Toto
- Tracy Chapman
- Travis Tritt
- Ty Boogie
- U2
- Ulrich Schnauss
- Uncle Luke
- Vanessa Hudgens
- Vengaboys
- Vitamin String Quartet
- Will Young
- Will.I.Am
- Wynonna Judd
- Xtreme