Adele's 21 is world's biggest-selling album

British singer Adele has reached another milestone. She has become the fourth Briton in five years to record the world's biggest-selling album.

British singer Adele has reached another milestone. She has become the fourth Briton in five years to record the world's biggest-selling album.

Adele has sold 18 million copies of her album 21 that accounted for 1.6 percent of total album sales around the world, reports dailystar.co.uk.

Singer Amy Winehouse, band Coldplay and Susan Boyle previously topped the international album sales chart since 2007.