Some fans have speculated that she wore a wig to the Grammys last weekend
It's true that reporting on the colour of a pop star's hair usually means that it's a slow news day.
When the pop star in question is Billie Eilish, however - who has become known for her trademark black and green hair in recent years - it's not quite as clear-cut.
The most famous hair in pop has been switched up, as the 19-year-old has dyed her mop blonde following last weekend's Grammys - and she looks completely different.
She debuted the hairstyle on Instagram, saying nothing except "pinch me".
The post has been liked almost 16.5 MILLION times in the past 16 hours, and fans have reacted positively to the change... while some have speculated that her green and black hair was a wig for at least some of the last two years, following the Tik Tok video below...