this is the most important question i've ever gotten in my life i literally had to take a month to answer. AND IT WAS TOO HARD LIKE I PHYSICALLY CANT JUST CHOOSE ONE. so here are a BUNCH of songs (obvi i have a lot for heehoon i have playlists for them that are like 200 songs each). also minimum 1 government assigned taylor swift song per member.

sunghoon:
mirrorball (taylor swift)
cowboy like me (taylor swift)
black swan (bts)
liability (lorde)
true blue (boygenius)
birds of a feather (billie eilish)
homesick (wave to earth)
girl so confusing (remix) (charli xcx ft. lorde)

heeseung:
the archer (taylor swift)
this is me trying (taylor swift)
superposition (daniel caesar)
do you like me? (daniel caesar)
limbo (keshi)
love wins all (iu)
von dutch (charli xcx)
west side (ariana grande)

riki:
you're on your own kid (taylor swift)
gold rush (taylor swift)
my love mine all mine (mitski)
teenage dream (olivia rodrigo)

jungwon:
long live (taylor swift)
love (wave to earth)
white ferrari (frank ocean)
here with me (d4vd)

jake:
cruel summer (taylor swift)
please please please (sabrina carpenter)
obsessed (olivia rodrigo)
poster boy (lyn lapid)

jay:
style (taylor swift)
so american (olivia rodrigo)
imperfect for you (ariana grande)
texas (keshi)

sunoo:
august (taylor swift)
after midnight (chappell roan)
needy (ariana grande)
lovegod (sarah kinsley)

btw i would happily expand on the characterisations that led me to make each of these choices... if anyone even cared... if anyone wanted me to elaborate on anything...... anyway