The 27-year-old underwent the nose cartilage wall piercing at tattoo parlour MasterMind Ink, in Chicago. Sporting dark brunette hair, Gaga dressed casual, wearing just a printed off-the-shoulder top as she posed alongside the piercer.
Posting the same photo to their Facebook account earlier today, MasterMind Ink said: "Lady Gaga stopped by MasterMind Ink today and had our Head Piercer and Manager Steve Bennett pierce her septum."
Gaga's piercing follows a make-up free photo which she shared with fans last night (22 July). The stripped back snap shows Gaga wearing a skimpy white top, and looking almost unrecognisable with no make up on.
Gaga excited fans last week by revealing details of her new studio album ARTPOP. But last night the 'Bad Romance' singer wrote a brief message to fans, revealing that she was scared to revisit "pain" on her new single, which will make its debut on 19 August.
She said: "ARTPOP as they pry the single from my bleeding fingers. It's a scary thing to revisit those things underneath, the pain in your past. but all I found was raw passion.
"I thought I was destroyed inside. I'm just ready to fight. Start the music."
The eccentric performer has been away from the limelight after undergoing hip surgery earlier this year, although she made quite an impression last week as she strolled through the streets of New York in a black lace bra.
Check out some of Gaga's most bizzare outfits below:
Copyright: Rex Features