Many celebrities have been spotted with their PS1 shoulder bag from Proenza Schouler, but a few consider it a favorite accessory, Dakota Fanning and Emma Roberts are seen with it all the time but others don't stay behind, celebrities that have been seen with it are Jessica Alba, Sky Ferreira, Olivia Wilde, Nicky Hilton, Leighton Meester and many more. Check out the bag below. Proenza Schouler PS1 Large Leather in White / $1,995 Forward Proenza Schouler PS1 Medium Suede in Tobacco / $1,695 Forward PS1 Extra Large Leather in Smoke / $2,350 Forward