Since I'm German I translated the text into better English:
Selena Gomez new single is called "Come & Get It"! The song was written by Ester Dean (Katy Perry, Beyonce, Usher), M.S. Erikson & T.E. Hermansen (Ne-Yo, Rihanna) and produced by Stargate. "Come & Get It" is the first single from her new album, which will be released this summer.
The reason they're making us wait for a snippet is cause they're going to get Selena to trend it, and Demi is trending #DemiWhiteOut, probably her new music video or album cover. It would be horrible if they did them both in 1 day