List of the UK's best-selling albums of the 21st Century revealed

It is expected that 21 would be the number 1 album of the century considering it is a sleeper hit. It stayed at number 1 for more than 20 weeks. It is also the number 1 selling album for two consecutive years. During this era when albums rarely sells, Adele managed to do that. Her album 25 is also a big seller but the weeks it spent at the charts is not comparable to 21. Still, both albums were very successful. 

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