The sweetheart neckline is something we have all seen before and the design flatters the admired collarbone. As the name suggests, it shows the curves at the top of the heart and has been in the existence before the 1500s.
I created a top with a sweetheart neckline and interlined all the fabrics together while also using a boning technique to give that accurate structure to create a perfect shape.
Looks good! There is a typo in your title though.