I built this really fun background just from ArtPlay Twinkle Artsy Kardz and Artsy Transfers.
Can you find me in the photos? (Not the cute young lady modeling the awesome tablecloth tops, that's my "Taylor"). There is more journaling on the left, but I left it out for posting.
When I use screen shots from Instagram, I like to retain the rounded corners by adding a Rounded Rectangle Custom Shape, clipping the photo to the shape, then adding a Stroke and Drop Shadow.