It's actually more of a sheriff's star shaped "washer" placed around her nipple with a bar piercing to hold it on.
I was a little suprised at that one. I was actually watching the HD broadcast, but I didn't watch the half time show. Other than the flash, there wasn't much to see. But ah, the internet, you can find anything. Even some eBayers taking advantage of the slip and their HD capture cards (item already removed).
But how could you make any excuses for that? Her boob "pocket" was a button on. Please.
CBS's HD coverage would have been better had they had a full crew of HD cameras instead of switching back and forth to "digital".
And yeah, you do kind of get spoiled by HDNet's hockey and college football broadcasts. Even their commercials.