"Rolling in the Deep" is a song recorded by English singer-songwriter Adele for her second studio album, 21. The song was written by Paul Epworth and Adele, who described it as a "dark blues-y gospel disco tune". It was first released on 29 November 2010 as the lead single off the album. 
The song has been acclaimed by music critics. The single has peaked at number one in some countries in Europe, as well in Canada and the United States. As of August 2011, "Rolling in the Deep" had sold over 4.93 million copies in the United States, making it her best-selling single outside her home country, topping her previous best-selling "Chasing Pavements".