The singer put out 'No Better' on iTunes worldwide today. Listen to the track in full below:
According to Line Of Best Fit, the track is an off-cut from her debut album Pure Heroine.
The 17-year-old released her first LP in September this year, topping the charts in Australia and New Zealand and entering the top five in the UK and US.
The album includes the singles 'Royals' and 'Team' as well as buzz track 'Tennis Court'.
Lorde also appears on the new Hunger Games: Catching Fire soundtrack with a cover of Tears For Fears' 'Everybody Wants To Rule The World'.