Hot off of the first warm weekend we've had this year, we're dying to find out how Chicago welcomed summer. We know you've all got your phones glued to your hands, Instagramming every moment, and we want to see what you've got. Tag your best summer instagrams from the weekend with #chisummer2012. We'll pick our favorites and run a slideshow this Friday. Think your Instagram skills are top-notch? Prove it! While you're at it, make sure to check out @refinery29 on Instagram, too.