Who is your Favourite Group and song & The Rules

What is your favourite Group?

Mine are :

~Apink
-Bomi,Naeun and Chorong

~Girls Genaration
-Seohyun,Taeyeon and Tiffany

~Exo
-D.O,Lay and Chen

~Shinee
-Taemin and Minho

Rules:

-Post Any Kpop songs would also hope to hear your choices
-Please do not post any non-kpop songs
-Be Nice to one another
-No FANWARS
-Don't Swear Much
-No Trading in this group

That's the rules atm I may come up with more soon!