(The project group Dramatic Blue, has highest rating so far)

Many award ceremonies and song festivals are held every year in South Korea. We've listed the ratings of these ceremonies for you. There are 2 major companies in Korea that provide TV ratings data: TNMS and Nielsen. Kdrama ratings are usually based on Nielsen because Nielsen has a larger network and is more reliable. But since Nielsen does not always release data for ceremonies and festivals, the data announced by both companies are listed below. The years when rating companies did not release the data were left blank. 

The groups gained the highest 1 minute viewers for the entire show down below:

SBS Gayo Daejun

2012
Dramatic Blue (collab between BEATS's Yoseob, 2AM's Jo Kwon, MBLAQ's G.O, INFINITE's Woohyun, Teen Top's Niel) 18.2% -TNMS

2013
Ailee 11.7% -TNMS

2014
2NE1 11.1% -TNMS

2015
-no data-

2016
GOT7 9% -TNMS

2017
Red Velvet 10.8% -Nielsen
Winner 10.6% -TNMS

2018
BTS 10% -TNMS
Song Mino 9.4% - Nielsen

2019
BTS 7.4%

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MBC Gayo Daejun

2014
Ailee 11.5% -TNMS

2015

-no data-

2016
Twice 8.4% -TNMS

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KBS Gayo Daejun

2012
SHINee's Taemin and Jonghyun & 2AM's Jinwoon and Changmin & Beast's Yoseob & CNBLUE's Minhyuk & Infinite's L & B1A4's Jinyoung 16.6%

2013
Miss A 13.8% TNMS

2014
EXO's D.O., Baekhyun and Chanyeol & Infinite's Hoya, Sunggyu and Dongwoo & Beast's Yoseob 11.3%

2015
-no data-

2016
Gfriend 10.3%

===

MAMAs

2012
Bigbang 7.35%

2013
Bigbang 6.917%

2014
GDxTaeyang 3.4%

2015
EXO 3.2%

2017
EXO 2.1%

2018
BTS 2.2%

Source: Nielsen & TNMS via Naver 

(*The data were obtained from the rating news published in Naver after the shows.)