So what’s their secret to getting this ever-elusive formula just right? Refinery 29 tapped Sabrina Fuentes, Ella Moore, and Eva Kaufman — the trio behind NYC-based band Pretty Sick — who turned to PUMA Fenty by Rihanna’s latest collection (think: varsity-inspired knits, velour track pants, and platform boots) to create party-ready looks that are as relaxed and cool as they are.

Lily Baldwin's film shows us how it's done! 

Lily Baldwin on set with Pretty Slick.