Lady Gaga wears lacy Bra while in New York Sidewalk?

Lady Gaga was spotted in New York only wearing a bra and short skirt on July 11, 2013.
It's crazy hot in New York with temperatures balancing out around the 90 degrees fahrenheit. So, what's the best thing to keep cool?
Do the Lady Gaga style--just wear a bra while you're out in the streets.
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