Bauer-Griffin | | Marc Piasecki, WireImage

Lady Gaga
's on a mission to prove she's not afraid of some chilly winter weather. In fact, forget about wrapping up warm with a scarf and hat -- Gaga didn't even bother putting on pants as she stepped out in Paris for a shopping trip in between concerts yesterday.

The singer headed out in a black leather jacket, fishnets and black patent leather platform booties. She also had on a sheer beige bra and undies, which didn't seem to do much to prevent her butt from being on display or to protect her from the freezing cold.

She headed into the preppy Bruce Field boutique on rue Richelieu, where, according to an employee, she bought a number of things, reports People StyleWatch. But apparently not pants.

Similarly not reassuring? PVC-style outfits like this one are contributing to the spike in bondage-style lingerie sales this Christmas.

Click here to see Gaga flashing some boob and belly in Paris yesterday.

And don't miss out on her most outrageous looks from 2010.

Click here for more celebs rocking the pantless look.