"21" is the second album from Adele, and was recorded while she was 21. It was originally going to be an upbeat album until Adele separated from her partner, and the album turned into a heartbreak album. "21" was a sleeper hit at release, becoming the best-selling album of 2011 and 2012, and being certified diamond. Many of the songs on this album were smash hits and are easily recognizable by most people. "21" draws some inspiration from country music, but stays true to Adele's usual style of gospel, soul, and pop music. This record breaking album is amazing and a must-listen for anyone. "21" is still listed on the Billboard's Top 200 Albums for over 500 weeks now. It is the best-selling album of the 2010's and the fastest album to reach diamond certification with 92 weeks. Adele has a beautiful singing voice, and that matched with the perfect melodies, created this award winning masterpiece.