That would be Simplicity 4589. Love it! I've had the pattern in my stash since last summer, but never got around to trying it out. I made this yesterday during nap time. I was able to trace my pattern, cut it out and sew it up in about 2 hours. That's my kind of pattern! The pieces all went together well, and I hardly had to make any modifications. All I did was add 4" to the bottom. Next time I'll probably add a little width to the center front (for the girls), and maybe do a bit of shaping through the middle, but those are easy to do. This is the perfect top for summer, made in a cool cotton fabric. I made this one in a dotted swiss I bought on sale at Hancock's. I'd like to try the short sleeve version next, though I am partial to sleeveless tops. I love that this sleeveless version has straps wide enough to wear with a regular bra. That's always a plus in my book!! Good thing I have a collection of light weight cottons in my stash - don't be surprised if I make another one before the weekend is up!!