While we're pretty sure the dip-dye's had its day and it's all about technicolour highlights now, we've got to admit the singer's latest look is an excellent way to get attention.
Dressed head-to-toe in the designer's new line, it's probably fair to say Lily's a big fan of the new high street collection.
This isn't the first time Lily's made the news for her barnet. Back in February the 'Hard Out Here' songstress had heads turning as she hit the Brit Awards 2014 red carpet in a full-length sequin gown and a canary yellow ponytail.
While the star didn't exactly start a trend, other celebs have experimented with the cray-cray hair dye since.
Adding a touch of colour isn't a new thing, and even the most, er, sensible of celebs including Rachel McAdams, January Jones and squeaky clean Lauren Conrad have all had a pop at colourful tresses.
The most badass of them all though? Dame Helen Mirren at the BAFTAs in 2013.
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