Adele's second studio album, "21," is a masterful collection of soft pop songs that showcases her powerful vocals and heartfelt songwriting. Released on January 24, 2011, under XL Recordings, the album spans 48 minutes and features 11 tracks that delve into themes of love, heartbreak, and self-reflection. With hits like "Rolling in the Deep," "Someone Like You," and "Set Fire to the Rain," Adele's soulful voice and poignant lyrics resonate deeply, making "21" a timeless piece of art. The album's emotional depth and Adele's raw vulnerability have made it a beloved classic, capturing the essence of personal growth and resilience.