Pixie looked stunning from top-to-toe as she joined the likes of Emma Noble, Mark Ronson, Ollie Lock and Oritse Williams at the Amy Winehouse Foundation Ball at The Dorchester Hotel in London.
The 'Boys and Girls' singer stunned in a floor-length, red Alice Temperley gown and carried a classic black and white clutch to top off her elegant, chic look.
We totally loved her hair and make-up which oozed movie star glamour and was a far cry from the pink eyebrows she showed off on Instagram just a day earlier (which we ALSO loved btw – pink eyebrows, c'mon, what's not to love?!).
Last night, Pixie went for more grown-up, Hollywood look, with super-long false lashes and smouldering smoky eyes which were lined with white eyeliner for a real '60s feel.
And her matte, red pout? Perfection. Now that's how to wear red lipstick.
Pixie's look was created by celebrity make-up artist Emma Brizzie who's also the assistant manager at MAC Cosmetics.
Hmmm, we wonder what Emma used to create those gorgeous lips, then? MAC Lipstick per chance?
Our bet is MAC Lipstick in Russian Red, £15, maccosmetics.co.uk which is loved by all manner of celebrities for its amazing true red shade and long-lasting finish.
Apply two layers with a lip brush for the best results, then blot with a tissue and finish with a light dusting of translucent face powder.
If red lips scare you, however, go for a slightly sheer colour to give you a similar look, but with a much more toned down finish!
Try L'Oréal Paris Rouge Caresse Lipstick in Rebel Red, £7.99, superdrug.com and blot it with your forefinger for a stained, subtle look.
If your lips err on the thin side, gloss should be your number one choice, not lipstick.
Gloss reflects light better which gives the appearance of a plumper pout.
We love YSL Rouge Pur Couture Vernis À Lèvres in No.25, £23.50, boots.com which gives a shiny finish, but stays-put forever. Genius!
Finally, if you really want your lip colour to last practically forever, ditch the lipstick totally and colour your whole lips with lip liner instead. Honestly, it really works!
Try Bobbi Brown Lip Liner in Red, £16, bobbibrown.co.uk which we don't mind admitting, we can't get enough of at Reveal HQ!
What's your red lip beauty essential? Let us know below. Our fave comment across the site each week wins £50!