"Love this!" she said of the poster. She even reacted to her followers, adding: "LOL. Too funny, too sweet."
The clever flyer says Janet was "last seen looking like she hopped right out of 1997 into 2015. Maybe she's a time traveler?"
Urging her fans to find "the mysterious lady in black," it goes on to plead: "Seriously Janet, where the hell are you? We NEED you back. We miss you. Your fans miss you. THE MUSIC INDUSTRY NEEDS YOU."
Janet has not been seen at a public event since the Vogue Fashion Dubai Experience Gala Dinner on October 31, 2014. Her last original studio album, Discipline, was released in 2008.
While fans are clearly craving more music from the 48-year-old artist, Janet hasn't hinted at any new projects since August 2014 when she tweeted: "If there is a new project, you'll hear it from my lips."
Regardless, this flyer insists: "Come back and show these young whippersnappers how it's done!"