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.
Stitch lace or ruffles to spaghetti straps to widen. (Although this may be a bra, you get the idea.) Sew a ring on the underside front and back of top. Use chains or strings of beads, attach with necklace clasps for easy removal to wash top.