Wearing her hair in simple, black waves, we reckon Katy could single-handedly bring back the return of the classic black Alice band!
Katy, 29, is currently in Tokyo, Japan to promote her latest album and she looked chic and sophisticated at the official launch yesterday in a black beaded dress and cute, Mary Jane shoes.
We have to admit, however, we were very surprised at her choice of hair accessory. Where were the cute kitten's ears she's so famous for wearing?
When she arrived at Tokyo's Narita International Airport last Tuesday (29 October) she was proudly sporting tiger-print cat's ears for her adoring 'Katycats' fans.
But these were long gone yesterday when she opted for this simple headband in plain black.
Now, it's not often we see a hot, young celebrity going for this kind of headband – they're much more reminiscent of '90s schoolgirls than red carpet A-listers!
But that's not to say we disapprove.
Far from it.
Not only does the headband serve as a perfect way to simply keep your hair off your face (which is never a crime if your face looks anything like Katy Perry's!), but when coupled with an elegant dress, tiny pearl earrings, understated eye make-up and pretty pink lips?
Well, it's a look that screams 'butter wouldn't melt'.
Rihanna, take note!
If you want to get in on the action, try this bargain Black Velvet Alice Band, £2.18, amazon.co.uk. Or if you fancy glamming it up a touch, we also love this Woven Chain Alice Band, £8, accessorize.com.
What do you think of the humble Alice band? Is it a trend you'll be embracing this autumn? Let us know below - our fave comment across the site each week wins £50!
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Watch Katy's 'Roar' video below: