So what’s their secret to getting this ever-elusive formula just right? To show us how it’s done, we 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. Watch the video above to see how they pull together their killer on-stage ensembles, and then scroll down to get the scoop on every last detail.