The graphic iconography (hearts, bloody eyeballs, pink dinosaurs and kooky toy figurines from Tokyo) worked across crop tops, tees, tanks and skirts is edgy and excessive. The Barbie pink prints and Japanese slogans are exactly how to experiment with fresh, fierce, top-to-toe summer style.
We caught up with Phoebe - who shot, styled and directed the campaign herself - to talk her love of Harajuku girls' cutesy style, who she wants to see wearing the collection and find out exactly when we can get our hands on it all.
"The collection is print and motif heavy, it's fun and experimental. Imagine a bipolar sort of style inspired by Harajuku girls who use fashion as a true form of self expression, I like how liberating that is," she told us.
"I was already a fan of Illustrated People so it made sense to collaborate and design something totally different. I'd wear everything from the collection myself, it's for every girl who likes a tougher look to work anywhere."
Who would she love to see in her designs? "Definitely girls like Jourdann Dunn, Iggy Azalea, Azealia Banks and Angel Haze."
Using Japanese imagery, emojis and toys, Phoebe cut shapes and quirky images with the Illustrated People team to create layered graphics and girly, grungy street wares. The kind of styles that demand a closer look and a wearer who screams confidence and swag.
What does the "Kawaii" slogan across the collection mean? "It means 'cute'!'" Phoebe beams, which is pretty ironic given the whole bleeding eyeballs theme.
When it comes to fashion icons Phoebe's is Hiari Ikeda a Japanese model, but other influences come from: Stanley Kubrick films, hip hop and fashion - she's big on Nicola Formichetti, Meadham Kirchoff and Moschino.
The collection lands in Topshop stores and online at www.illustratedpeople.com/phoebe 26th May 2014 with its own #PhoebeXIP on Twitter and price points start from £35.
Take a look at this behind the scenes footage from the COOLEST collaboration on the scene this summer.