Lorde has topped Billboard magazine's annual ranking of "music's most powerful minors".
The star beat 5 Seconds of Summer and Justin Bieber - both who gained second and third place respectively - to rule at the top of the list.
Hailing the group of singers as "perhaps the most impressive crop of under-21 stars" ever assembled by the magazine, they're all being tipped for bright futures.
"These 21 artists have already accomplished a great deal, but are safe bets to continue finding success as they edge toward adulthood.
"For now they're just kids, but they're the kids that everyone in music is watching."
Martin Garrix and Fifth Harmony rounded out the top five, and The Vamps, Cody Simpson and Chief Keef appeared further down the list.
A chart of the 21 biggest hits from the past 21 years from artists under 21 was also release to mark the list's publication.
Topping that was LeAnn Rimes with 'How Do I Live' - released in 1997 when she was just 15.
Mario took second place with 'Let Me Love You' - released in 2005 when he was 21 - and Lorde appeared again in third with 'Royals'.
Billboard magazine's 21 under 21 2014 in full:
1. Lorde
2. 5 Seconds of Summer
3. Justin Bieber
4. Martin Garrix
5. Fifth Harmony
6. Austin Mahone
7. Earl Sweatshirt
8. Shawn Mendes
9. Becky G.
10. Chief Keef
11. Luis Coronel
12. Meghan Trainor
13. Cody Simpson
14. Madeon
15. Bobby Shmurda
16. Scotty McCreery
17. Troye Sivan
18. Rae Sremmurd
19. Akdong Musician
20. The Vamps
21. Unlocking The Truth
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