"Turn my sorrow into treasured gold," cried Adele Adkins on "Rolling in the Deep." It was a confession and a prophecy. 21 was this year's most stunning pop success, transmuting the young Brit's personal sorrow – the collapse of an 18-month relationship – into a 13-million-selling smash that leapt across borders and oceans and united everyone from teeny-boppers to baby boomers to hip-hop-heads. The sound is state-of-theart retro soul, with touches of Motown, bossa nova and 1970s piano pop. But at its heart was that voice: giant, classic-sounding, promising emotional depth way beyond its years. More than any other album this year, 21 made you feel its pain – from the triple-hankie tear-jerker "Someone Like You" to ripsnorting revenge songs like "Rumour Has It," where Adele rides a roiling groove and flattens everything in her path.