Most copies of one album sold in a single year

Most copies of one album sold in a single year
Who
Adele's 21
What
26400000 unit(s) sold
Where
Not Applicable ()
When
Adele's (UK) album 21 sold an unprecedented 18 million copies worldwide in 2011, including 5.82 million copies in the USA and 3.73 million in her homeland. By the end of 2013, 21 had shifted 26.4 million copies worldwide. It is the biggest-selling album of the 21st century and is among the 40 biggest-selling albums of all time.