Star power
Charli managed to make 'Brat' a landmark album without any features, but in a bid to ramp up things up even more, the pop star recruited pop royalty for an epic remix album entitled 'Brat and It's Completely Different but Also Still Brat'.
Billie Eilish features on the hit 'Guess' with racy lyrics about the 'Birds of a Feather' hitmaker wanting to bed Charli.
Putting to bed rumours of rivalry between Charli and Lorde - who have been heavily compared over the years - the New Zealand pop star jumped a remix of 'Girl, so confusing'.
If that wasn't enough, pop megastar Ariana Grande added her vocals to 'Sympathy is a Knife' and Robyn and Yung Lean feature on the '360' remix.
Meanwhile, Charli's '1999' collaborator Troye Sivan - who she embarked on the 'Sweat Tour' with in between her 'Brat Tour', jumped on a new cut of 'Talk Talk'.
The Strokes star Julian Julian Casablancas, Shygirl, and even The 1975 also jumped on the 'Brat' train.