I believe this tiny Sweat Bee is Augochlora pura based on research in BugGuide. They move really fast while gathering pollen so it's tricky to get a clear shot. Their iridescent colors always catch my eye in the garden.
As for the flower, it seems to be a defective Star of Bethlehem in that it only has five petals whereas every other one blooming in my garden has the typical six-petal flower form of Ornithogalum umbellatum. The flowers are gorgeous and have volunteered themselves all over my garden.
I'll be posting this to Macro Monday over at Lisa's Chaos... you should check it out! Her blog is pretty terrific!