This year we had many successful idol groups from all gens but here is I would rank the top 5 of most successful in my opinion:
1. BTS: the most successful group in the world it doesn’t need explanation.
2. Aespa: Next Level the biggest idol group song in SK in 2021, Savage album and song keeping them at the top and making sure if you didn’t think they were the moment now you will. Them winning 2 daesangs including the Record of the year at MMA becoming the first female artist to do so. The list of achievements they got not only as a 4th gen but for ggs and even idol groups is really long.
3. Brave Girls: The unexpected success of Rollin’ alone deserve this rank, even tho I’m kinda bittersweet their comeback didn’t perform as I expected they keep getting many brand deals and I’m sure their future will be huge and they have more sides to show and many talent to come with an even bigger smash hit.
4. NCT DREAM: The second best performing boygroup on Melon and winner of a bonsang at MMA, the second best selling album on Gaon, the third most streamed bg MV of the year. NCT DREAM first full album Hot Sauce was massive and got plenty first records for them and the NCT brand.
5. TXT: Their rise of physical sales wasn’t what impressive me the most but their performance on US charts, like I truly didn’t expect that amazing longevity plus their album having such amazing reviews and being one of the most streamed albums, I think TXT deserve this rank. Many people even before their debut were expecting them to peak right after debut but that didn’t happen and we love to see it.
NOTE: I only counted the ones that released music in 2021 because for example BLACKPINK despite not dropping group music they are #1 in many gg ranks and achieved a lot all around the world while only doing solo activities through this year.