21

21 is Adele's second studio album centered on her powerful, emotive voice and personal songwriting about heartbreak and recovery. It blends pop structures with soul and blues-tinged arrangements, moving between sparse piano ballads and more driving, gospel-tinged pop-soul tracks; notable singles include "Rolling in the Deep", "Someone Like You", and "Set Fire to the Rain". The production emphasizes roomy, dramatic arrangements that foreground her vocals and direct emotional delivery, and the album showcases a blue-eyed soul approach applied to mainstream pop songwriting.