AGE 18: Lorde

Musician

What makes her powerful: When she was 17, the New Zealand native won two Grammy awards for "Royals," including Song of the Year. She may have missed out on a best original song Oscar nomination for "Hanging Tree" in "The Hunger Games: Mockingjay, Part 1," but she did curate the entire soundtrack to the movie which, at 18 years old, is an impressive résumé builder.