One thrift store vest + one thrift store denim shirt = one Free People inspired denim shirt.
Here's the original Free People shirt:
I removed one pocket and used it as a pattern to cut a new pocket from the vest fabric.
I zig-zag stitched across the top of the new pocket to keep the woven fabric from unraveling and then stitched the pocket onto my shirt, again with a zig-zag stitch.
For the back I used a piece of paper to draw out my pattern first, then cut from the vest, and stitched on.
Total cost for my shirt: $4 ($2 for the vest and $2 for the shirt)