I went through my top 150-ish on Last.fm and made this big list. This is more or less what I listen to on a regular basis. Will need to keep updating it because it's nowhere near complete.
Western Music
Pop/Top 40/etc.
- Lady Gaga
- Charli xcx
- Ariana Grande
- Beyoncé
- Britney Spears
- Janet Jackson
- Mariah Carey
- Nicki Minaj
- Kylie Minogue
- Azealia Banks
- Rihanna
- Miley Cyrus
- Carly Rae Jepsen
- Iggy Azalea
- Katy Perry
- Ciara
- Alanis Morissette
- Michael Jackson
- Madonna
- Jennifer Lopez
- Taylor Swift
- Destiny's Child
- cupcakKe
- Christina Aguilera
- TLC
- Kesha
- Lana Del Rey
- Dua Lipa
- RuPaul
- Gwen Stefani
- SOPHIE
- Tinashe
- Missy Elliott
- Demi Lovato
- Paula Abdul
- Slayyyter
- Kim Petras
- Doja Cat
- Billie Eilish
- Calvin Harris
- E-Rotic
- Megan Thee Stallion
- Debbie Gibson
- Fifth Harmony
- Rina Sawayama
- MARINA
- Usher
- Selena Gomez
- Fergie
- Kelly Rowland
- P!nk
- Lizzo
- David Guetta
- Mýa
- Pitbull
- ABBA
- Captain Jack
- Taylor Dayne
- Martika
- The Pussycat Dolls
- The Weeknd
- Tove Lo
- Cher
- Hilary Duff
- Lil' Kim
- Cardi B
- Kimbra
- Bananarama
- Poppy
- Shakira
Electronic
- Skrillex
- Disclosure
- Dubloadz
- CFCF
- Wayne Lytle
Japanese Music
J-Pop
- Ayumi Hamasaki (浜崎あゆみ)
- Kumi Koda (倖田來未)
- capsule
- Kyary Pamyu Pamyu (きゃりーぱみゅぱみゅ)
- Seiko Oomori (大森靖子)
- WEDNESDAY CAMPANELLA (水曜日のカンパネラ)
- Perfume
- Hikaru Utada (宇多田ヒカル)
- Namie Amuro (安室奈美恵)
- BENI
- m-flo
- AI
- Do As Infinity
- Charisma.com
- Especia
- hitomitoi (一十三十一)
- moumoon
- Kana Nishino (西野カナ)
- Ai Otsuka (大塚愛)
- E-girls
- AKB48
- JUJU
- DREAMS COME TRUE
- ALI PROJECT
- AAA
- Naoto Inti Raymi (ナオト・インティライミ)
- Crystal Kay
- Ringo Sheena (椎名林檎)
- Che'Nelle
- MoNa a.k.a. Sad Girl
- Aimer
- MISIA
BEMANI
- NAOKI
- Ryu☆
- and many more...
Rock
- Chatmonchy (チャットモンチー)
- ASIAN KUNG-FU GENERATION
- noodles
- ONE OK ROCK
- advantage Lucy
- and many more...
K-Pop
- BoA
- 2NE1
- Red Velvet
- Girls' Generation (소녀시대)
- 4minute
- HyunA (현아)
- BLACKPINK
- SHINee
- TWICE (트와이스)
- ARTMS (ex.LOOΠΔ [이달의 소녀])
- f(x)
- there are definitely more...
Mandopop & Cantopop
- Joanna Wang (王若琳)
- Jolin Tsai (蔡依林)
- SingerSen (歌者森)
- A-Mei Chang (張惠妹)
- there are definitely more...
Vaporwave, Future Funk, etc.
- Vektroid
- Blank Banshee
- James Ferraro
- ECO VIRTUAL
- SAINT PEPSI / Skylar Spence
- マクロスMACROSS 82-99
- 続く・・・ちょっと待ってください