Lorde performs Royals at the 56th annual Grammy Awards in Los Angeles, California, on Sunday night. Picture: Mario Anzuoni

Los Angeles - New Zealand teenager Lorde's Royals won the song of the year Grammy Award on Sunday, one of the annual award show's top prizes.

“Thank you to everyone who has let this song explode because it has been mental,” Lorde said when accepting the award.

The prize, handed out by the Recording Academy in a televised ceremony from Los Angeles, honours the writers of the song - Lorde, whose real name is Ella Yelich O'Connor, and Joel Little. - Reuters