Ever since I bought my Geren Ford black tank with ruffles, I've had a new found appreciation for ruffled tops and even tiered tops since they usually tend to look like they're ruffled. Its like you add a little bit of dress and class to your everyday casual outfit. Of course, its easy to go terribly wrong with tiers and ruffles so keep it at a level where your body isn't swallowed up by them! Here are some great ones that I found on Saks:
12th St. by CV:
Tiers and ruffles, oh my!
See by Chloe:
Just that little patch of ruffles will work wonders!
See what I mean by dressy/classy but causal??
Pretty simple tanks but just give it a try and you'll see :)
And if you really get into ruffles, expand to jackets and whatever else you can find that is tiered and/or ruffled but once again...make sure they dont eat you alive :D