21
21 is Adele’s 2011 album, written and recorded in response to her breakup with her first serious partner — a relationship that began in April 2009 and ended shortly after. Early attempts to write an upbeat, contemporary follow-up to '19' failed due to lack of inspiration, leading Adele to cancel sessions. Production resumed immediately after the split, with songs channeling heartbreak and depression. The album’s sound draws on classic and contemporary country and roots music, influenced by Nashville music she heard on her 2008–09 US tour — a sound she found exciting precisely because it was unfamiliar. Its title reflects her age and personal growth over the prior two years.