let me correct you
2007: BigBang "Lies"/WG- tell me
2008: TVXQ "Mirotic" also can be BB- haru haru/Wonder Girls "Nobody"
2009: Super Junior "Sorry Sorry"/SNSD "Gee"
2010: SHinee - lucifer/Miss A - good girl bad girl
2011: Beast "Fiction" also can be Infinite's be mine/2NE1 "I Am the Best"
2012: BigBang "Fantastic Baby"/Sistar - alone (roly poly is 2011)
2013: EXO "Growl"/SNSD "I Got a Boy"
2014: Winner - empty/Sistar "Touch my Body"
2015: BigBang "BangBangBang"/Gfriend "Me Gustas Tu"
2016: BTS - BS&T/Twice "Cheer Up"
2017: BTS - spring day/Red velvet - red flavor
2018: Ikon - love scenario/Blackpink "Du Du Du"
2019: BTS "Boy With Luv"/Blackpink "Kill this Love"
2020: BTS - dynamite/Blackpink "How You Like That"