Gaga - real name Stefani Germanotta - is pictured holding up a prosthetic arm while wearing a clear plastic safety mask. The 'Bad Romance' singer, who is sporting long brunette hair and natural-looking make-up, is seen staring intently at the object.
We're not sure what look Gaga is trying to achieve but she's certainly left us intrigued!
The 27-year-old teased a similar photo this week (6 August) where she appeared to thrust the plastic arm in one hand while standing with both legs apart in huge platform shoes.
Teasing her new music on Twitter, she said: "ARTPOP is ELECTRONIC CANDY & DELISH ON THE EARS. #Applause10DAYS."
Gaga first released details of ARTPOP earlier this month and got fans in a frenzy with the news of her music comeback.
Her single 'Applause', which will be the first song taken off the new album, is due for release on 19 August.
Check out some of Gaga's most bizarre outfits below:
Copyright: Rex Features