Lady Gaga showed off her new tattoo for fans ... and possibly revealed the title of her next album!

"new ink new album," the singer tweeted last night with the photo, which shows the word "ARTPOP" on her left arm (we're assuming the photo was taken in a mirror ... and that it's not actually a backwards tattoo).

Getting inked up is nothing new to the star, who already has a rose, peace sign, the words "Little Monsters" and a unicorn/"Born This Way" tattoo ... among many others.

"Born This Way," of course, was the name of her last album, so maybe she's continuing the trend.

See more inked up stars in the gallery above!

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