She's famous for wearing kooky and revealing outfits all year round. So Lady Gaga has to push the boat out when it comes to choosing an ensemble for Halloween.
And this year was no different, as the 26-year-old singer wore an incredibly daring costume to celebrate the spooky holiday.
Gaga wore a green tutu-skirt with a long fluro wig as she partied with her personal make-up artist Tara Savelo.
The Born This Way singer appeared to be some kind of mermaid, with green sparkly stars on her breasts to conceal her modesty.