sentences:  "Royals", the EP's single, helped Lorde rise to prominence after it became a critical and commercial success, selling more than 10 million units worldwide.It charted at number one on the "Billboard" Hot 100, making Lorde, then 16 years old, the youngest artist to earn a number-one single in the United States since Tiffany in 1987, and has since been certified diamond by the Recording Industry Association of America (RIAA).The track won two Grammy Awards for Best Pop Solo Performance and Song of the Year at the 56th ceremony.