so, people already recommended most of the groups i like
but you need to check too:
Lee Seung Gi: (pop - popballads! try his latest album "Tonight" one of kpop best albums of last year <3)
SISTAR
Son Dam Bi
Davichi
W&WHALE
Jewelry (especially the Sophisticated album!!!!)
IVY (I be album is like on the best albums in kpop ever)
Seo In Young