Netizens are fiercely debating over what the "Biggest 3rd-generation K-Pop girl group hit song" is.

The candidates are:

1. TWICE's "Cheer Up"

2. BLACKPINK's "DDU-DU DDU-DU"

3. Red Velvet's "Red Flavor"

4. GFriend's "Rough"

5. Momoland's "Bboom Bboom"

Many netizens were largely divided between TWICE's "Cheer Up" and BLACKPINK's "DDU-DU DDU-DU". Others also pitched in their thoughts on comments on the remaining candidates. 

Some said:

"In all honesty, the representative 3rd generation girl group is TWICE and their representative song is 'Cheer Up'. The entire country was crazy about 'Sha-Sha-Sha'."

"The only song on this list that won 'Daesang' and ranked #1 on the yearly chart was 'Cheer Up'."

"No K-Pop girl group song has topped Melon's yearly chart since 'Cheer Up'."

"It's not an exaggeration to say that 'Sha-Sha-Sha' was the most popular phrase of that year."

"When it comes to representing a generation, you can't only look at charts or views. It's about the general public's awareness, and when it comes to that, it's 'Cheer Up'."

"Everyone remembers 'Cheer Up' being the song that always came on during school festivals, school events, and all kinds of big gatherings."

"'DDU-DU DDU-DU' is the most viewed K-Pop girl group MV of all time. Isn't that enough to prove that it was 'DDU-DU DDU-DU'?"

"'DDU-DU DDU-DU' is the girl group song that made K-Pop global."

"'DDU-DU DDU-DU' was the biggest hit song in all of Asia that year."

"2016 was a legendary year for 3rd generation girl groups. 'Cheer Up' and 'Rough' ranked #1 and #2 on Melon's yearly chart."

"'Rough' was legendary. GFriend managed to climb their way up to the top from a small company and didn't lose against the big 3 groups."

"Of all the songs here, 'Red Flavor' is the song that still plays where ever you go in the summer."

"Interestingly, 'DUDU-DU DDU-DU' ranked lower than 'Bboom Bboom' on the Korean charts."

"In 2nd-generation, each of the top girl groups have one song representing them (Wonder Girls 'Tell Me', Girls' Generation 'Gee', and 2NE1 'I Am The Best'), so I think these five songs are representative songs by the top 3rd-gen girl groups."

"It's more like TWICE opened the 3rd generation and BLACKPINK closed it. Just like how EXO opened it and BTS closed it for boy groups."