Billie Eilish is having a Brat summer.
The nine-time Grammy winner hopped on a remix of Charli XCX’s Brat bonus track “Guess,” as well as the music video for the NSFW track.
In the visuals, released on Aug. 1, colorful underwear fly across the screen as Charli lets loose amongst a group of scantily clad dancers. As she sings about her own pair of briefs, the 31-year-old references Billie’s 2024 track “Lunch,” an equally steamy song suspected to be about oral sex.
“Eat it up for lunch,” Charli sings, before the 22-year-old busts through the wall driving a tractor. “Yeah, it’s so delicious.”
Charli and Billie then strut down a street filled with lingerie while singing—you guessed it—about their own underwear. “I saw them when you sat down, they were peaking out. I’m gonna tell you right now they’re all I”m thinking about,” Billie drawls before glancing over at the “360” singer. “Charli likes boys but she knows I’d hit it.”
The video ends with the pair dancing atop of a literal mountain of underwear. They stomp, spin and strut about, before tossing around bras and teasing their fans with questions like, “You wanna guess what me and Billie have been textin' about?”
And for those wondering what exactly is Brat? Not only is it the name of Charli’s sixth studio album, but it’s also “that girl who is a little messy and likes to party and maybe says some dumb things sometimes,” according to the singer.
In fact, so many people have resonated with both her album and attitude that they’ve labeled this season “brat summer,” touting neon green looks, strappy white tank tops and big black sunglasses to match the album’s aesthetic.
Even Vice President Kamala Harris has joined in, branding her presidential campaign headquarters' X (formerly Twitter) profile with green after Charli called her “brat” on social media.
"This campaign and for me - at my most pure, my most charli, my most brat," Charli wrote in a June 8 Instagram post. “I think we all feel that something quite special is happening rn."
She added, referencing the album's viral lime cover, “We road tested language, autotune, font, pixelation and spoke constantly about pop theory, narrative, the concept of desire and of course narrowed down around 65 shades of green to the final most ultimate most brat green.”
Keep reading for more on Charli's journey to brat summer...
2009
Charli XCX began her music career in 2008, posting songs on Myspace before being discovered by a promoter.
2011
After signing a recording contract with Asylum Records in 2010, the singer-songwriter (real name Charlotte Emma Aitchison) spent her early years discovering what kind of musician she wanted to be.
“I didn’t know who I was,” she told The Guardian in 2013. “I didn’t know what I liked. Even though I was signed, I was still figuring it out.”
2012
The Cambridge, England, native had her first major breakthrough as a writer and collaborator on Icona Pop's "I Love It," which hit number one in the U.K. the following year.
2013
Charli released her debut studio album, True Romance, in April 2013.
2014
The following year brought yet another iconic collaboration with the release of "Fancy" with Iggy Azalea. And it wasn't long after that her track "Boom Clap" became a sensation after being featured in The Fault in Our Stars, starring Shailene Woodley and Ansel Elgort.
2015
She joined Taylor Swift for a punk performance of “Shake It Off” during the 1989 World Tour stop in Toronto.
2016
Charli traded in her signature edgy style for a sporty tennis skirt in this 2016 portrait session.
2017
The British pop sensation stayed true to herself as her career took, releasing mixtape, Number 1 Angel in 2017.
“Number 1 Angel is probably my favorite music that I’ve released,” she told the San Francisco Chronicle that March. “It was me just doing my thing, saying what was on my mind, without pressure or intention.”
2018
She once again joined Taylor on stage, playing over 50 stadiums as one of two openers—Camila Cabello was the other—for the Reputation Stadium Tour.
2019
Five years after her last studio album, she released her third studio album, Charli.
"This is the most personal body of work I will have released," she told E! News in September 2019. "I cover ground I have covered before, but I also delve into my own mental health, which is a new thing for me. It just felt like the right time to discuss it."
2020
To the Brit Awards, Charli opted for a “chic and girly” look—as she described to British Vogue—donning a black Fendi gown.
2021
The "Apple" singer was dressed to impress in a lacy black dress for the 2021 MTV Music Awards.
2022
The Grammy nominee posed with Paris Hilton for the 2022 Spotify Wrapped playground party in Los Angeles.
2023
She's everywhere, she's so Julia—including at the 2023 Vanity Fair Oscar party, where she stunned in a gothic two-piece gown.
2024
The pop star attended the 2024 Met Gala, rocking a punk-inspired Marni gown that was mended together from vintage T-shirts.
2024
Brat summer has officially begun with Charli XCX touring with Troye Sivan for their 2024 Sweat Tour.
The release of Charli's sixth album, Brat, kicked a viral cultural phenomenon into gear, with even Vice President Kamala Harris playing into the trend as part of her presidential campaign. After all, Charli proudly deemed the politician to be “so brat.”