The 'Roar' singer looked the picture of elegance as she stepped out at the Mademoiselle C film screening after-party in Paris last night (1 October).
Katy nailed ladylike chic in a skin-tight pencil dress, featuring a striking metallic print and long silky sleeves.
She let her stand-out frock do all the talking by pairing it with nude patent heels and a scraped-back updo.
And she sported a ravishing make-up look too, with glossy raspberry lips and oodles of fluttery lashes. Also attending the bash was Rita Ora, who wore a questionable black lace headband, and her best pal Cara Delevingne.
Earlier on in the day, Katy looked catwalk-ready as she went for lunch at L'Avenue restaurant in the French capital.
She flaunted her curves in a printed bodycon skirt with a matching shirt tucked in, adding ankle cuff heels and dark sunnies.
We also spotted her Chanel 'lego' bag, which has been the arm candy du jour in Celebville for a while now.
Both Rosie Huntington-Whiteley and Rita Ora are fans, but with an eye-watering £5,370 price tag, we'll be staying well clear!
Unsurprisingly Katy toted her perspex clutch while attending the Chanel Spring/Summer 2014 show at Paris Fashion Week the same day.
The raven haired starlet stunned in a monochrome floral dress from the Chanel Resort 2014 collection (naturally, darling).
She was also pictured with the most amazing thing we've ever seen - a giant Chanel 2.55 quilted handbag.
Can we have one please?
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