Hot off last month's Billie Eilish-dominated Grammys, the 18-year-old is back for another shot at awards show glory. On Tuesday (February 18), Eilish made her BRIT Awards debut, walking the red carpet in head-to-toe plaid before taking the stage for her live performance.

Among the other red carpet highlights at London's O2 Arena: Harry Styles and Niall Horan got all suited up, Ellie Goulding dared to bare, and Lizzo was a real-life Hershey bar. See all the best and boldest looks below.

Billie Eilish

The queen of oversized designer ensembles strikes again! This time, Billie opted for head-to-toe Burberry, wearing a tan sweatshirt and capris, an embellished trench coat, sneakers with ankle-cut socks, and a cool clear visor. As only she could.

Charli XCX

She went "next level Charli" in a Fendi tiered tulle gown with a plunging neckline.

Lizzo

Harry Styles's new BFF walked the carpet dressed as a real-life Hershey bar. Her Moschino creation consisted of a strapless brown satin gown with everything you would find on the milk chocolate candy's label, right down to the bar code. Ever the detail-oriented diva, she even carried a shimmery chocolate bar clutch.

Ellie Goulding

How's this for a head-turner: Goulding wore a daring, skin-bearing gown resembling a stained glass window.

Harry Styles

We'll call this look "grandpa chic." Ever the dapper gentleman, Styles wore a brown Gucci suit with a purple sweater layered over a white collared top.

Niall Horan

Elsewhere on the carpet, Styles's former One Direction bandmate Niall Horan rocked a navy velvet suit.

Hailee Steinfeld

The Dickinson actress looked glam in a sheer navy dress with dark floral embellishments. Coincidentally, her look perfectly coordinated with her ex Horan's suit... just sayin'.

Melanie C

Damn, Sporty Spice! Mel C traded in her signature tracksuit for a show-stopping black gown that was cinched at the waist with a rope belt.

Jorja Smith

After winning British Female Solo Artist last year, Smith returned to the BRITs ready to take a sartorial risk. This vibrant, spotted jumpsuit fit the bill.

Stormzy

The Heavy Is The Head rapper kept it cool in a winter-appropriate, all-white look.

Burna Boy

Speaking of winter, Burna Boy's blue puffer coat was an eye-catching pop of color.

Anne-Marie

We weren't sure Anne-Marie could top the colorful drama of last year's poofy, feathered coat, but she managed to one-up herself with this pastel princess look that matches her pink hair.

Mabel

The Best New Artist nominee was a vision in red, posing in a sequined gown with an oversized bow detail.

Lewis Capaldi

As per usual, the four-time nominee kept it casual in Vans and a blue jacket, giving photographers the thumbs-up as he strolled down the carpet.

FKA twigs

File this under "looks only FKA could pull off." The stylish singer rocked a black and white ensemble with puffy sleeves and simple black heels.

Mahalia

We don't like this look... we olive it! (Sorry.) The "Do Not Disturb" star was a vision in velvet green.