Making a hit song is obviously an immensely difficult task. Making a hit song stay as the number one hit song for any given time is even harder.
There have only been six idol groups so far that have mega-hit songs that managed to stay as number one throughout an entire year. This achievement is one that even singer-songwriter IU couldn't manage to pull off, though of course, she has other record-breaking accomplishments under her belt.
Wondergirls - So Hot
Their mega-hit song So Hot has stayed as #1 for the entire year of 2008.
Girls' Generation - Gee
Girls' Generation's song 'Gee' has dominated the #1 spot throughout the year of 2009.
Miss A - Bad Girl Good Girl
In the year of 2010, Miss A held the #1 spot with their song, 'Bad Girl Good Girl'.
T-ara - ROLY POLY
Although now disbanded, T-ara had their moments during their career when their song ROLY POLY ranked #1 for the year of 2011.
Big Bang - Bang Bang Bang
Their addictive and catchy single 'Bang Bang Bang' managed to keep them on the #1 spot during the year of 2015.
TWICE - Cheer Up
Their cute and bubbly single 'Cheer Up' was played over and over all over the nation, making it the #1 song of 2016.