What's the name of this pornstar?

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"You kind sir must be new around here if you do not know that is Gianna Michaels," is a six-month-old comment below, responding to... what? The answer was correctly given as Gianna Michaels.

I'm not new around here, and I didn't know the lady above was Gianna Michaels. What was the commenter getting at, that everyone should know Gianna Michaels?

Even our operator must not have known Gianna Michaels, because the answer was correctly provided (as Potro has kindly confirmed), and yet the one who provided the answer was not credited. (Sometimes the criteria used for awarding the points -- this one had accumulated to a whopping +174 -- can be pretty arbitrary.)
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You kind sir must be new around here if you do not know that is Gianna Michaels.