IU, EXO and MamaMOO were nominated for the top spot on SBS Inkigayo' in the second week of December.
Inkigayo, which aired on the 8th, IU competes for the top trophy with Blueming, EXO with Obsession, and MamaMOO with Hip. The rankings are determined by combining the scores of music, SNS, viewer pre-voting, Live broadcast, and online music.
On this day, Inkigayo will feature Golden Child, Kim Young-chul, Nature, Park Ji-hoon, Bandit, Seven Clack, Se-Seung, Astro, Ivan, AOA, EXO, One-on-One, Space Girl, One Team, Lee Jun-young and JxR.
About SBS Popular Songs
Inkigayo is a South Korean music program broadcast by SBS. It airs live every Sunday. The show features some of the latest and most popular artists who perform on stage. It is broadcast from the SBS Open Hall in Deungchon-dong, Gangseo-gu, Seoul.
 Wikipedia