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Cara Delevingne uses ex-beau Harry Styles as inspiration as she attempts the rock chick look in plunging plaid shirt and fedora at the BRIT Awards and afterparty

Published: 13:52 EST, 25 February 2015 | Updated: 22:57 EST, 25 February 2015

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She enjoyed a very famous but fleeting romance with style trailblazer Harry Styles.

And now Cara Delevingne is mimicking his dress sense as she rocked up to the BRIT Awards 2015 in an Yves Saint Laurent ensemble, including a hat and open shirt, in the image of her former beau.

Cara, 22, flashed a peek at her lace bra with a low-cut red shirt on Wednesday as she injected a touch of sex appeal to a typical Harry get up.

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Stylish: Cara Delevingne worked a chic boyfriend look at The Brit Awards 2015 on Wednesday

During the show, she switched gears, throwing on a sleeveless semi-sheer lilac dress as she presented.

Later on, she returned to her original outfit - with a few tweaks - when she attended Universal's after-party held at the Old Sorting Office.

Wearing a smart blazer, she swapped her top for a white sheer blouse with a black-and-white scarf, while her donned a pair of smart flat shoes.

Cara Delevingne ditches the dress for rock chic at Brits

Boyfriend style: Cara, who dated One Direction singer Harry Styles in 2012, looked like she'd taken a few styling tips from the star

Flash! Despite her rather masculine aesthetic, Cara revealed her lacy bra underneath the shirt

Clothes horse: The beauty made an androgynous look appear effortless in black and red

The beauty, who took one of Wednesday's hot tickets to the BRITS, may not be famous for her musical talents but she was sure to be among the most photographed of the evening.

Cara walked away with the Breakthrough Actress Of The Year award at Elle's Style Awards the previous evening, as she has five movies due out in 2015.

The films - Pan, Paper Towns, Kids in Love, London Fields and Tulip Fever - are all in post-production following a busy year for the model turned actress.

Whoop! The model appeared jokingly stunned at her breast nearly slipping out of her precariously unbuttoned shirt

Cool and comfortable: The model turned actress looked more at home in trousers and a shirt

Breaking composure: In front of her fans, Cara was releasing her boisterous side

Selfie queen: The social media enthusiast took some time for a few fans snaps with the crowd

Who's on the line? Cara looked like she was having a chat with a pal while meeting her fans on the red carpet

Cara, who was rumoured to have dated the One Direction singer for around two weeks, looked like she was altogether more comfortable in the tomboy look than her elegant dress and lipstick look from Tuesday's Elle Style Awards 2015.

Separated from her usual supermodel army of Kendall Jenner and Jourdan Dunn for the night, Cara was posing with a different and altogether edgier possy on Wednesday.

She cosied up to the well-dressed friends and appeared to echo their style in a snap for Instagram saying: 'My dates this evening @christabel_rose @willheardmusic @scillywilly @piccalillicaff #BRITS'

Smouldering: With her hair wavy under a flat hat, she worked a dark make-up look with ease

Hungry? The fun-loving star couldn't help but lick her lips

BRIT AWARDS 2015 - WINNERS

British Male Solo Artist: Ed Sheeran (presented by Rita Ora and Orlando Bloom)

British Group: Royal Blood (presented by Jimmy Page)

International Female Solo Artist: Taylor Swift (presented by Lewis Hamilton and Ellie Goulding)

British Female Solo Artist: Paloma Faith (presented by Mark Ronson)

Global Success Award: Sam Smith (presented by Kim Kardashian)

International Male Solo Artist: Pharrell Williams (presented by Cara Delevingne)

British Single: Mark Ronson (presented by Lisa Snowden and Lionel Richie)

International Group: Foo Fighters (presented by John Bishop)

British Breakthrough: Sam Smith (presented by Fearne Cotton and Charli XCX)

British Artist Video Of The Year: One Direction (presented by Karlie Kloss and Jimmy Carr)

British Album Of The Year: Ed Sheeran for Multiply (presented by Russell Crowe)

She appears to have separated herself somewhat from the modelling industry after becoming a front row face instead of a regular on the catwalk at this year's London Fashion Week.

Cara also seems to be skipping Milan Fashion Week - the third all-important date in the style calendar - as her gal pal Kendall Jenner jets out to report for more modelling duty.

Speaking to The Telegraph late last year, Cara opened up about modelling when she said: 'I never really thought about modelling it wasn't something I ever wanted to do.

Gal pal: Cara later bumped into Ellie Goulding - who looked an ethereal dream in white - and encroached on her pictures

Contrasting duo: The red and black tones of Cara's ensemble clashed with Ellie's angelic white gown

Say cheese! The two gorgeous ladies gave their biggest grins

'I used to always be so angry about modelling. I was always like, "F***, I'm never going to able to act because I'm a model.

And the supermodel addressed her happiness within the modelling industry, after the past four years turned into a confusing 'whirlwind' for the megastar.

She continued: 'You get inside the tornado and you know exactly what [a whirlwind] is. It's madness. You get so caught up in so many things that it can be difficult to find the time to say, "Am I actually OK with this? Am I happy?"'