"21," the second studio album from English singer-songwriter Adele, made its grand debut on 24 January 2011 in Europe under the XL Recordings banner, followed by its North American release on 22 February 2011 via Columbia Records. Aptly named after the age Adele was during its creation, "21" channels the Motown and soul influences of her debut album "19," while also venturing into the realms of American country and Southern blues, inspired by her experiences during the North American leg of her tour, "An Evening with Adele."
 
Crafted in the aftermath of Adele's separation from her then-partner, "21" delves deep into themes of heartbreak, healing, introspection, and forgiveness. The songwriting journey for "21" commenced in April 2009, amidst the throes of the relationship that would go on to shape the record. Seeking to depart from the somber tones of her debut, Adele initially aimed for a more vibrant and contemporary sound. However, creative stagnation halted studio progress until the dissolution of her relationship reignited her creative spark. Pouring her heartache and melancholy into her music, Adele collaborated with esteemed songwriters and producers such as Rick Rubin, Paul Epworth, Ryan Tedder, Jim Abbiss, and Dan Wilson.
 
"21" surpassed the modest commercial expectations of Adele's label, XL Recordings, emerging as a sleeper hit that dominated charts in over 30 countries. It soared as the world's best-selling album for both 2011 and 2012, injecting new life into the global music industry. In the UK, it reigns as the best-selling album of the 21st century and holds the record for the longest stint atop the UK Albums Chart by a female solo artist, clocking in at 23 weeks. Across the pond in the US, "21" etched its name in Billboard history as the best-performing Billboard 200 album of all time, spending a remarkable 24 weeks at the top, a feat unmatched by any album since 1985 and the longest reign by a female solo artist in Billboard 200 history. Certified Diamond by the RIAA for exceeding 10 million copies sold in the US alone, "21" boasts an impressive roster of hit singles, including international chart-toppers like "Rolling in the Deep," "Someone like You," and "Set Fire to the Rain." With global sales surpassing 31 million copies, "21" stands as a monumental testament to Adele's artistry and enduring legacy, firmly securing its place as one of the best-selling albums of all time in the 21st century.