Adele fans think the artist may have a new album on the way

Adele fans think the singer has a new album coming. And they may be right.

Social media users this week began noticing signs and billboards with the number "30" in different parts of the world and believe that's a nod to a comeback, nearly six years since the artist's last album, "25."

One Twitter user claimed that "30" signs had been spotted by fans in more than a dozen countries. A music station in Dublin posted a video with the number "30" on Camden Street.