my favourites, all in alphabetical order. many great songs didn't make the list. kpop, khiphop, and related genres and artists. jpop and wpop are in this list as well, as long as they're performed by (possibly former) kpop artists.

2022

• blackpink - pink venom
• sunmi - heart burn

2021

• aespa - next level
• epik high - rosario (ft. cl, zico)
• iu - celebrity, strawberry moon, lilac
• twice - scandal, scientist
• yubin - perfume

2020

• aespa - black mamba
• boa - better
• blackpink - ice cream (feat. selena gomez), lovesick girls
• changmin - all that love
• cl - hwa, 5 star
• ha:tfelt - la luna
• hyo x raiden - think about me (feat. coogie)
• omg - nonstop
• stayc - so bad
• twice - more & more, i can't stop me

2019

• aoa - come see me
• fyke feat. amber - get myself
• blackpink - don't know what to do, kick it, hope not
• boa - feedback
• bom feat. dara - spring
• brown eyed girls - wonder woman
• cl - in the name of love (all songs)
• everglow - bon bon chocolat
• hara - midnight queen
• hyuna - flower shower
• iu - blueming
• jisook - big dipper
• luna - even so
• mamamoo - gogobebe
• minah - butterfly
• nabi - bibi
• somi - birthday
• sulli - goblin, dorothy, on the moon
• sunmi - noir
• taeyeon - spark
• tiffany - magnetic moon
• yubin - silent movie (무성영화) ft. yoon mirae
• zgirls - streets of gold

2018

• amber, luna - lower
• aoa - bingle bangle, ladi dadi
• apink - i'm so sick
• blackpink - square up (all songs except DDDD), kiss and make up (with dua lipa)
• boa - nega dola, irreversible, i want you back
• chungha - roller coaster
• gugudan - not that type
• exid - lady
• g-idle - latata
• ha:tfelt - pluhmm
• hyolyn - dally
• hyomin - mango
• hyo - sober, punk right now (with 3lau)
• kard - ride on the wind
• mamamoo - egotistic, starry night
• oh hyuk, cifikia - momom
• pristin v - get it
• red velvet - bad boy
• snsd - lil touch
• sojin - close your eyes
• sunmi - heroine, siren
• suzy - sober
• taeyeon - something new
• tvxq - the chance of love
• victoria - roof on fire
• winner - everyday
• yubin - lady

2017

• amber, superfruit - fantasy
• andup - hold up
• apink - five
• blackpink - as if it's your last
• boa - jazzclub
• brave girls - deepened
• clc - hobgoblin
• girl's day - everyday 5 (all songs)
• gugudan - chococo
• hyolyn, changmo - blue moon
• hyuna - mirror, babe
• jimin - hallelujah
• lee hyori - black, unknown track, seoul, love me, mute, diamond
• luna - tell me it's okay / 괜찮다고 말해줘 (as lundolph yongjunko)
• krystal, june one kim - i don't wanna love you
• melodyday - kiss on the lips
• minah - truth, 11 degrees
• minzy - work 01 uno (all songs)
• pristin - wee woo
• sojin - kumbaya
• sunmi - gashina
• suzy - pretending to be happy
• taemin - move
• yves - new

2016

• amber, ksuke - breathe again
• amber, luna - wave, heartbeat (with r3hab, ferry corsten, kago pengchi)
• aoa - good luck (all songs), give me the love
• apink - only one
• berry good - don't believe
• blackpink - whistle, playing with fire, stay
• boa, beenzino - no matter what
• bubble x - hit it
• dal shabet - someone like u
• eunji - hopefully sky
• f(x) - all mine
• gain - end again (all songs)
• hyuna - a'wesome (all songs)
• ioi - crush
• kard - oh nana
• kisum - no jam
• luna - free somebody (all songs), 그대라서 / it's you
• minah - jump
• rainbow - whoo!
• shinee - 1 of 1
• sojin - 1991년, 찬바람이 불던 밤
• taeyeon - 11:11
• tymee - cinderella
• wonder girls - to the beautiful you, why so lonely, sweet & easy

2015 (incomplete. in progress)

• 4minute - crazy
• bestie - love emotion (all songs)
• bigbang - bae bae, sober, loser
• boa - kiss my lips (all songs)
• bts - dope
• cl - hello bitches
• clc - pepe
• f(x) - 4 walls (all songs except cash me out)
• girl's day - macaron, ring my bell, hello bubble, with me
• iu - 23
• jay park - lotto
• laboum - aalow aalow
• minah - i am a woman too
• miss a - only you
• red velvet - cool world
• sojin - everyday with you
• sonamoo - cushion
• twice - like ooh ahh
• wonder girls - i feel you, oppa, one black night

2014 (incomplete. in progress)

• beenzino - how do i look?
• cl - mtbd
• dal shabet - bbb, rewind
• girl's day - something, darling, look at me, timing, whistle, show you, i don't mind, i miss you,
• ha:tfelt - me? (all songs)
• oh hee jung - 하늘로 올라가는 비​ / rain goes up to the sky
• orange caramel - catallena, abing abing, my copycat
• sojin, dok2 - finale
• sunmi - full moon
• t-ara - sugar free, little apple

2013 (incomplete. in progress)

• 2ne1 - falling in love
• bestie - love options
• girl's day - white day, expect, female president, let's go,
• ladies' code - pretty pretty
• lee hyori - monochrome (all songs)
• lim kim - goodbye 20

2012 (incomplete, in progress)

• bigbang - blue
• glam - party (xxo)

useful links: https://en.wikipedia.org/wiki/2016_in_South_Korean_music (and then replace 2016 with the year you want)