A year ago, the British soul singer was an unknown in America. Sunday night, he took home four Grammys, including song of the year, record of the year (both for “Stay with Me”), best new artist and best pop vocal album (for “In the Lonely Hour”). He also gave a dazzling performance of “Stay with Me” with Mary J. Blige pitching in. About the only thing that could have made it better was if Tom Petty, who was credited on the song thanks to similarities to “I Won’t Back Down,” had joined him. Smith said as he won song of the year, “I’m having a really, really, really good night.” That was an understatement.
