Hilton, 29, altered her appearance for a shopping spree in Paris.
Channeling her inner mime, the blonde heiress, who usually favors pink dresses and track suits, hit the streets in black leggings paired with a black-and-white-striped bow graphic-print top, and tucked her tresses under a brunette wig and black cap featuring a giant "look-at-me!" white star.
Completing her not-so-incognito ensemble: a pair of oversized sunglasses.
While in the spy shop, the former sex-tape star was seen fiddling with spy cameras and other high-tech gizmos, reports the Daily Mail.
No word if she completely blew her cover by constantly repeating "That's hot!" but she did later tweet, "I love gadgets!"
The perfume peddler also loves designer labels. During her day of shopping in the City of Light, the dim star also popped into Chanel and Christian Louboutin, where she did a bit of retail damage.
"Bought so many beautiful things! Karl Lagerfeld is Amazing!" she tweeted, later writing, "Love My New Chanel Purse I got Today. :)"
And Hilton was so excited about her new shoes that she couldn't even type straight.
"J'adore Christian Loubuiton," she captioned a Twitpic of a black heel with spiked silver studs, before catching her mistake. "Oops, I meant - J'adore Christian LouboutinSorry was rushing and didn't pay attention to what I typed. I love my Loubs! :)"
StyleList has gotta hand it to Hilton for dressing for the occasion as far as the spy shop is concerned. We just don't want to know what she'd wear for a night out at the Moulin Rouge.
In related news, check out the wigs Angelina Jolie wears in her new spy thriller, "Salt."