Best Girl Group: Red Velvet
This was a competitive year between the usual top three dogs: Twice, Red Velvet, and Mamamoo. Each of them have taken home this title once in the last three years, and now Red Velvet are the first to grab their second award of this name. Mamamoo have been the most active, and Twice likely have the best numbers, but Red Velvet were not far behind in many of these aspects throughout the year. We don't speak of their first showing in 2019 but "Umpah Umpah" was a good summer jam while "Psycho" made plenty of good impressions with such a late release. Ultimately I believe that Red Velvet is most deserving by remaining the most consistent girl group showing marked improvements with each subsequent song.
Best Boy Group: BTS
Death, taxes, and BTS winning the Best Boy Group award. They've fully monopolized this category since the series debut in 2015 and until their military service fractures their production it doesn't seem like they'll stop. Their achievements, statistics, and legacy are overwhelming at this point considering all of the impact they've had (both the good and bad). Compound this with the fact that other groups of this generation simply cannot match BTS' output at an individual or group level and it's easy to see why they've had a iron grip on this award. Also worth noting is that they were unparalleled in the meme department as well. From "Seoul Town Road" to "Chicken Noodle Soup," BTS were firing on all meme cylinders.