Today is the day!
To get her fans extra excited, the 19-year-old teased some of the goodies to Snapchat on Thursday. Take a look (below):
[Image via Instagram.]
Not only will the Christmas windows be dedicated to her, but for the first time EVER the posh retailer will transform the entire 5th floor of the Madison Avenue flagship into GaGa's Workshop.
And because the holiday season is a time for giving, Barneys will be donating 25% of all sales from the workshop to a charity of Lady GaGa's choice.