The singer and US X Factor judge is no stranger to switching up her image over the years, sporting everything from brown to black to red to (most recently) blonde.
This latest look, however, is certainly her most daring!
Plenty of celebrities have rocked blue hair in the past: Nicki Minaj, Katy Perry, Cher Lloyd and, just this week, Kim Kardashian's little sister Kylie Jenner.
Not everyone gets it right but we have to say, Demi has nailed it!
Demi, 21, was on the Jay Leno show on Wednesday evening (2 October) to perform her new single 'Neon Lights', the third track to be taken from her self-titled fourth studio album.
She announced over the weekend that she'll be supporting the album with a North American tour next year, named after the 'Neon Lights' single.
It will be an X Factor extravaganza for those lucky enough to nab tickets as Demi's support acts are Cher Lloyd, Little Mix and US girl band Fifth Harmony, who found fame on US X Factor.
Demi tweeted this week: "So excited that @LittleMixOffic @FifthHarmony and @CherLloyd will be joining me on #TheNeonLightsTour!!! #GIRLPOWER."
Watch Demi's music video for 'Made In The USA' below: