SI + Fall Previews on Instagram–This week, the models of Instagram celebrated the launch of Sports Illustrated’s 50th Anniversary Swimsuit Issue and the continuance of fashion month showing off the fall previews. Check out our weekly roundup of the industry’s top girls including Sara Sampaio, Cara Delevingne, Lily Aldridge, Nina Agdal, Sigrid Agren and more. And in case you missed it, view our previous Instagram recaps.