Photo: Lady Gaga during the show in Canada (before undressing)
The American star remained just in her fishnet stockings and a thong and was changing the costumes right on the stage.
The crowd of fans amounting some 14,000 people witnessed the "great baring".
It's not the first time the performer has stripped down to the delight of her fans. End of March, New York concert: Lady Gaga flashed her back in the revealing outfit leaving nothing to imagination.
See the 18+ photo from the Canadian show below: