Men’s button up to women’s button up tutorial (or button up peplum top tutorial). It has to be a VERY big top compared to your normal size to get these pleats. Also better with soft fabric, not a "dress" shirt.
Very detailed tutorial on turning a tshirt into a skirt complete with pockets! I just made one with a navy stretch lace shirt (with navy lining). Super ultra easy =) The pockets are my favorite part. Melly Sews: Easy T-shirt Skirt Tutorial