Adele waxay soo saartay albumkeedii labaad ee 21, 24 Janaayo 2011 gudaha UK iyo 22 Febraayo gudaha Maraykanka. Waxay sheegtay in albumka ay ku dhiirrigelisay kala taggiisii lamaanihii hore. Codka albumka waxaa lagu tilmaamay mid caan ah oo casri ah iyo waddan iyo muusig xidid. Isbedelka codka ka yimid albumkeedii ugu horreeyay wuxuu ka dhashay darawalkeedii baska oo ka ciyaaraya muusig casri ah oo ka yimid Nashville markii ay booqanaysay Koonfurta Ameerika, cinwaankuna wuxuu ka tarjumay kororka ay soo martay labadii sano ee la soo dhaafay. Adele waxay u sheegtay Spin Magazine: "Waxay ii ahayd mid aad u xiiso badan maxaa yeelay waligey kuma soo korin [muusikadaas]. " 21 ayaa ku dhufatay lambarka 1aad ee 30 dal, oo ay ku jiraan Boqortooyada Midowday iyo Maraykanka. Waxqabadka shucuureed ee "Some Like You" ee Abaalmarrada Britinka ee 2011 bishii Febraayo 15 ayaa ku riixay lambarka 1aad ee UK
kala taggii lamaanihii hore