Adele Promises to See 25 Again; Possibly Planning to Release New Album

May 5, 2014 -- Adele may be releasing new music this year.

The singer, who is celebrating her 26th birthday today, tweeted a cryptic message to fans.

"Bye bye 25... See you again later in the year x," she wrote, along with a selfie.

Adele Posts Personal Photos to Twitter

In the past, Adele's albums have been titled "19" and "21" -- references to the age at which she wrote much of the music. Could 25 be a reference to the title of her latest album?

Her rep has not responded, although she's definitely been working on new music.

Ryan Tedder of OneRepublic, who has worked on the album, said in March that Adele will release it "on her own timetable, at her own pace."

"The only person that will ever declare it finished will be her, when she decides it's finished," he said. "I could probably guess when [Jesus] Christ is going to return more accurately than when that album will come out. And that doesn't mean it's going to be a while, it just means I have no idea."