Hey there! I'm new..

I'm actually trying to locate an image of Phoebe that I have in my head from an episode (can't remember what season or what episode but i think it's probably one of the last couple seasons) wearing a light blue and green dress. It's not her usual style (quirky) it's actually a really pretty dress (comparable to a spring bridesmaid dress)..

I'm actually looking for the image because I've loved it since i saw the episode however many years ago and now i'm looking for my bridesmaid dresses and all i can picture is that dress..

If anyone has any idea what i'm talking about or can direct me to that image or episode I would greatly appreciate it! Thank you so much!