21 is the second studio album by English singer Adele. It was released on January 19, 2011. It sold 208,000 copies in the first week it was released. It went straight to number one in the UK Albums Chart. In the fourth week that "21" had been number one Adele sang "Someone Like You" at the 2011 BRIT Awards. Amazon.co.uk reported that the album increased in sales by 890% an hour after Adele's performance.