Adele’s second studio album, released January 24, 2011, became one of the best-selling albums of all time with over 31 million copies sold worldwide. Its heartbreak-driven soul and pop ballads dominated global charts for years.
Unprecedented Success
21 spent 24 weeks at #1 on Billboard 200—the longest run by any album since 1985. It topped year-end charts in 2011 and 2012—an extraordinarily rare achievement showing its sustained dominance.
Singles Domination
“Rolling in the Deep” won Record of the Year and Song of the Year at 2012 Grammys. “Someone Like You” became a global phenomenon after Adele’s emotional BRIT Awards performance. “Set Fire to the Rain” gave her a third #1 hit from one album.
Grammy Sweep
Won all six categories nominated at 2012 Grammys, including Album of the Year, Record of the Year, and Song of the Year. The sweep cemented Adele as the decade’s most dominant vocalist.
Breakup Album
Written about Adele’s relationship with an older ex-boyfriend, 21 captured universal heartbreak themes with devastating honesty. Her powerful voice and emotional delivery made breakup ballads culturally dominant in the early 2010s.
Cultural Phenomenon
The album sold over 5 million copies in 2011, 4.4 million in 2012, and continued charting years later. It’s certified 14× platinum in US and diamond in multiple countries. No other album of the 2010s matched its sustained commercial dominance.
Source: https://en.wikipedia.org/)