so this is what i think is this the "correct" line distribution based on the mv AND dance practice

i dont know if jiyeon really does sing the chorus but i left it as her anyway, if not im assuming they just gave her other members' lines to sing live because she [POSSIBLY] has no lines in the studio ver, admittedly the chorus part she sings does sound like her imo

and yes boram also sings "jinagagetji" in the studio ver, look at the dance practice and mv. (jiyeon sings it livr and lip syncs it for a split second in the mv but thats the case for her t-ara in general since they often lip sync each other's parts in mvs), and compare the voice in "jinagagetji" to the one in "jeongmal jokenne", u will notice its the exact same voice and jiyeon doesn't really sound like that, but boram does!!! AND another part that is not jiyeon is the 2nd verse which is eunjung!!! same in the mv and dance practice, eunjung is the one singing and being center in the choreo + it again does not really sound like jiyeon to me, she just sang it live but its really meant to be eunjung's line as seen in the mv and dance practice (god i hope i don't make it sound confusing haha)

Members + Color Codes

Boram (Yellow/Gold)
Qri (Light Pink)
Soyeon (Orange)
Eunjung (Dark Blue)
Hyomin (Teal)
Hwayoung (Green)
Jiyeon (Purple)

Album: Funky Town (Black Eyes Repackage)
My Bias: Boram, Qri
Release Date: January 3, 2012

Translation Source: https://colorcodedlyrics.com/2012/01/06/t-ara-lovey-dovey/