Katy Perry's giant  TA-TA's ... Alicia  Keys' underboobs ... Kelly  Rowland's twins ... turns out they were all given the stamp of approval  from CBS, despite the network's previously harsh warning to keep the  nakedness to a minimum.

Despite these revealing outfits, and  several more, a rep for CBS tells TMZ, "All wardrobe selections passed  our standards, if only barely."



You'll remember, CBS issued a memo urging  everyone in attendance to cover up or else - saying in part: "Please be sure  that buttocks and female breasts are adequately covered. Thong type costumes are  problematic. Please avoid exposing bare fleshy under curves of the buttocks and  buttock crack."

If this is the music biz covering up ... count us  in!

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