Im gonna agree with shirayuki~chan, but ill also add Yuni from katekyo hitman reborn!, her costume will run to the max of ur budget but you prob wont need a wig! Its an extremely cute cosplay too!
Kpop cosplay is life~
Cory- 24K U R So Cute **DEBUT**
PO- Block B Tell Them **DEBUT**
Baro- B1A4 Solo Day (Beach scene) **DEBUT**
POSSIBLE DEBUT: N-mi: VIXX Girls So Hot (VIXX So Hot cover)
CL- 2NE1 I am the Best