Back in May, I featured this pic (above left) of Ashley Greene in her Antonio Berardi dress and asked Insiders to vote on whether peekaboo dresses account for a trend or foe.

Apparently, Blake Lively would vote trend, considering she wore an all-black version of the same lacy sensation at "The Town" premiere in Boston just several months later.

I like this dress in both colors, on both ladies, so this one's a toss-up for me.

Photos (left to right): Bryce Vickmark/Getty Images; Michael Bezjian/WireImage