Can you rewear a bridesmaids dress?

I'm in a wedding this summer and the color pallet is the exact same as a wedding I was in last summer. I really want to rewear the bridesmaid dress because.. I don't want to buy another one. Duh.

The two brides don't know each other at all. Two completely different friendship circles. Am I in the clear to rewear the dress? Or is there some kind of wedding etiquette that I don't know about that says I can't wear the same dress.