This album is amazing. And people throw that word around quite a bit these days. But it's true. Stellar. I don't know why I did not jump on the Adele train sooner. I bought this and 19, her first album (coincidentally, also her respective ages when each album 'dropped') a few weeks ago and have not looked back. You may remember "Chasing Pavements" as her first big single from a couple of years back.
21 has been in constant rotation. Every song is a keeper. The first two are "Rolling in the Deep" and "Rumour Has It," and it took me about fourteen days to get past them because I kept hitting repeat. Thank goodness that I did because that soul is evident in the rest of the CD. She oozes talent. The link above is to Amazon, where you can preview. Except for the awesome cover of The Cure's "Lovesong," the tracks are all originals.
Give it a whirl; you won't be sorry. Oh, and she's British. It doesn't get much better.