Bleached-out eyebrows, purple eyelashes and almost-black lipstick? Well, there's a look we did not expect to see...
Katy joined some of our favourite style icons at this year's Costume Institute Gala at the Metropolitan Museum of Art in New York City on Monday.
And while Kristen Stewart rocked her new platinum blonde hair, and Met Gala first-timer Kylie Jenner nailed it in yet another fabulous wig, it was Katy's make-up that took centre stage on the red carpet.
Katy made an interesting fashion choice for the tech-themed, 'Manus x Machina: Fashion In An Age Of Technology' do, choosing a black velvet Prada dress adorned with gold chains, oversized keys and even a white, virtual Tamagotchi pet (remember those, folks?)!
And even though they arrived to the Met Gala separately, Orlando Bloom also wore a Tamagotchi in his lapel, offering up yet another sign that the duo are very much a couple right now.
The 'Roar' singer teamed her gown with black hair, piled high into a topknot, but let's get down to the real nitty-gritty and the fact that she was wearing coloured mascara. Yes, coloured mascara!
We rarely see anything other than black lashes on the red carpet, but we're rather partial to coloured mascara, which is yet another '80s trend to hit celebsville. When will they ever end?!
To channel the look, purple is definitely 'the' colour choice to go for as it works with all eye colours and skin tones. We love Bourjois Volume Glamour Max Holidays Mascara in Purple Mania, £5.99, boots.com.
Katy coupled her purple lashes with bleached out eyebrows, minimal eye make-up and that tricky-to-wear beauty trend, black lipstick.
Dark lips were a bit of a thing at this year's Met Gala with both Taylor Swift and Miranda Kerr also choosing to vamp up their pouts with deep, berry shades (above).
So, if you fancy getting deep and dark with your pout, you might want to get your hands on Clinique Almost Lipstick Black Honey, £18, boots.com which rich, without being scary!
But, if you're feeling super-adventurous, try Makeup Revolution Vamp Collection Lipstick Black Heart, £1, superdrug.com.
Wearing black lips and purple lashes at the same time might be more 'red carpet' than 'date night,' but choose one trend, pair down the other and you could well be onto a beauty winner.
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