I started with this nice $2.50 Forever 21 tee and an antique lace doily for the lace. It had stains on it but I didn't use the whole thing, so it was perfect for recycling into trim!
I used spray adhesive to put the doily where I wanted it and cut it into wedges of the right size and shape. Then I sewed it down on the strongest parts of the lace. I could have left it at that but I chose to do the cut-out thing, and cut out behind the free parts of the lace, kind of like on the first two Anthropologie tees I showed. Here it is!