This is an easy top refashion: Use a thrifted XL shirt/t-shirt to make a cute one-shoulder summer top.
The Options Abound Top from Modcloth
The Blue Hawk Blouse from Spool72
To make your own, you will need 1 XL top - t-shirt style, although mine was a silkier material - the bigger the better (mine was a size 26).
At this point, you can add an elastic waist if you choose using either elastic thread (how I did it) or sewing in a piece of elastic.
*** I used this tutorial to make my elastic casing using bias tape - worked great!***