BOMT has sold 30 million and Britney was literaly everywhere during that time.
And how long has it been out? 21 has sold 28 Million WW and its in the digital age of music Things no longer sell like this but Adele has, which is more impressive than what BOMT has done. Also are you saying Adele was not everywhere? After she stopped doing promo after SLY she was still everywhere
Do I also need to add that 21 is still selling WW even though the era has ended a long time ago?
Quote:
1 = Beyoncé - BEYONCÉ
2 = Avicii - True
3 = Daft Punk - Random Access Memories
4 = ABBA - ABBA Gold
5 +2 One Direction - Midnight Memories
6 = Michael Jackson - Number Ones
7 +1 Eminem - The Marshall Mathers LP2
8 -3 Justin Bieber - Journals
9 = Lorde - Pure Heroine
10 +2 Adele - 21
11 -1 Imagine Dragons - Night Visions
12 -1 Bruno Mars - Unorthodox Jukebox
13 = Kid Ink - My Own Lane
14 +1 Phil Collins - ...Hits
15 +3 Whitney Houston - The Ultimate Collection
16 = Arctic Monkeys - AM
17 +5 Bruce Springsteen - High Hopes
18 -4 Various Artists - The Secret Life of Walter Mitty
19 -2 Katy Perry - PRISM
20 -1 Lady Gaga - ARTPOP
BOMT. Britney was a phenomenon at the time. The BOMT video outfit is still referenced today.
Adele definitely became a phenomenon during 21 as well, hence why her album kept selling on its's own, long after she stopped promoting it. She just didn't milk it and stayed out of the public eye while it was happening.
BOMT is the biggest era ever and it changed pop music forever while 21 just brought 2 songs overused in talent shows
#gospel
Thriller is the biggest era ever.
21 changed the pop scene too. Why do you think dance music fell out of favor, why do think so many popstars have toned it down, and why do you think so many have tried to recreate her "Someone Like You" moment?
Things no longer sell like this but Adele has, which is more impressive than what BOMT has done. Also are you saying Adele was not everywhere? After she stopped doing promo after SLY she was still everywhere 
