The 27-year-old star took to Twitter to express her joy at having a mastered version of her album.
She wrote: "A MASTERED COPY OF ARTPOP WAS JUST DELIVERED TO ME, help. its real now.
"I can't believe it I've been waiting to say this for some time.. THIS IS THE ALBUM OF THE MILLENNIUM!!!!!!!!!!!! :)"
THIS IS THE ALBUM OF THE MILLENNIUM!!!!!!!!!!!! :)
— Lady Gaga (@ladygaga) October 15, 2013
The star also announced that her second single 'Venus' will be out two days earlier on October 25.
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Gaga has previously claimed that her second studio album Born This Way was the best album of the decade.
Lead single 'Applause' went head-to-head in a heated chart battle with Katy Perry's 'Roar', with the latter scoring Perry her highest first week sales of her career.
Billboard boss Bill Werde later criticised Lady Gaga during the release of 'Applause' for inflating her video views after retweeting a fan's playlist that included the video on repeat 135 times.
Lady Gaga admitted that she feels persecuted by detractors who find it 'entertaining' to try to destroy her.
ARTPOP will be released on November 11.
Watch the music video for 'Applause' below:
