A while back I posted a swatch of Envy by Hard Candy. At the time I also did a bit of playing around and tested some overlays. These are the results of me playing with Envy and a few other nail polishes. This first pic is Envy with Sweet P by Hard Candy over it, just one coat. If I had made the coat a bit thinner it might have worked out a little better.
This next swatch is of Envy with City Lights by Cover Girl over it. This works rather well I think. I would wear this out at night.