But what's more troubling is the fact that the two bikinis really are not the same. Remember, copyright is supposed to be about the specific expression and not the idea. But that doesn't seem to be the case here. The two bikinis are obvious inspired by similar ideas -- or one was inspired by the other -- but the actual expressions of those ideas are quite different:
Finally, even if the bikini is infringing, shouldn't the problem be with whoever made the infringing bikini, not who wore it (or who paid for the video including someone wearing it)?