Itsy-Bitsy Yellow With Polka Dots Bikini?

So, I'm more-or-less employed, finally. I got sick of spinning my wheels at home in front of the computer (no offense, computer), so I went to my employment agency and I asked for anything. So, I'm the receptionist for an certain not-for-profit local agency that, while it isn't explicitly in the business of practicing law, is swarming with lawyers nevertheless. Hopefully, all this face-time will lead to something bigger and better. Reception work (receiving? receptioning? receptionizing?) ain't lawyerin', but it gives me a reason to put a tie on in the morning.

So, have you seen this Yoplait commercial? You know, the one where there's this woman eating yogurt in various pre-summer seasons, and there's a yellow bikini with red polka dots hanging on the wall, and "Itsy-Bitsy, Teeny-Weenie, Yellow Polka Dot Bikini" plays cheerily in the background? You know the one I mean? It seems to me that that commercial is wrong, is it not? I mean, the bikini pictured is decidedly not a yellow polka dot bikini, in my mind. It is a red polka dot bikini, with a yellow background. Or, in the alternative, a yellow bikini with polka dots. Does "yellow" describe "bikini" or "polka dots"? Is this yet another case of my worldview being dramatically different than the rest of the human population? Discuss.

While you're at it, answer me this: is "polka dot" supposed to be hyphenated? Polka dot. Polka-dot. Hmm. Ponderance of ponderances.