02
Aug
Billie Eilish has gleefully joined the extended "Brat" universe with her featured spot on "Guess," a fan-favorite track from Charli XCX's latest album.The much-anticipated "Guess" remix dropped on Thursday with an accompanying music video, which portrays Charli and Eilish as flirty underwear fiends who, at one point, roll down a mountain of bras and lingerie.The whole thing is fun, cheeky, and deeply entertaining, a vibe the kids online might describe as "unserious."It's the latest in a series of "Brat" remixes that feel like proper stop-what-you're-doing-and-listen events, rather than cash grabs or flagrant bids for higher Billboard peaks.Eilish joins a fascinating…