Lorde is the most influential under-21-year-old according to Billboard

Lorde has 'topped' Billboard's annual 21 Under 21 list.

Aiming to find "music’s most powerful minors" (?!) the list sees Lorde move up five places from Number 6 last year, while Snapchat enthu­si­asts 5 Seconds Of Summer are new at Number 2.

Other young people on the list include Justin Bieber at 3, Fifth Harmony at 5, Becky G at 9 and Madeon at 14.

You can see the full list here.

Poor Willow Smith.