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Britney Spears has spent most of her time in Las Vegas recently, performing her “Britney: Piece of Me” show, which was extended for two more years in September. But Spears tweeted that she’s also working on a new album.

“Working hard or hardly working…new album,” she wrote.

Spears has been teasing a new project for weeks, posting photos from inside the studio and updates with the hashtag “#B9.” (The forthcoming album would be her ninth.) She has yet to reveal specifics about the collection, though she told E! News this summer, “We’re having fun right now. I’m working with some women who are amazing writers. I have ballads and, of course, dance music — fun cheeky sexy stuff.”

Spears most recently guest starred on Jane The Virgin. Her last album, Britney Jean peaked at No. 4 on the Billboard 200 in 2013.