I was first inspired to make this after seeing this: (and yes, this basically proves that I am a big copycat):
For my version, I used a mash-up of Simplicity 2599 and Colette patterns Macaron. I basically followed the instructions for the Simplicity top, but used the sweetheart neckline from Macaron. It was a pretty easy process that resulted in a very one-of-a-kind shirt. (You know, except for the one I copied. Ahem).
It's everything you could want in a casual spring top - comfortable, stylish, and easy. I foresee many Saturday afternoons and summer weeknights being spent in this shirt!
PS - Here's a little sneak peak of what I'm working on now...the Collette Patterns' Ginger skirt. Look at those matching stripes! Eh? Eh?