The pop queen said that she was practicing for the mystery project - due to happen "next week" - but didn't confirm what the rehearsals were actually for, Contactmusic reported.
She took to her Twitter account to reveal about her "top secret project".
When a fan responded speculating it could be a video for a new single, Britney simply replied with a wink.
The singer's new album will be produced by Naughty Boy and the first single is expected to be released next month.
A countdown clock - captioned "All Eyes On Me" - appeared on her website promising a big announcement on September 17 - with many speculating it could be the first song from the record, although it could be details of her eighth full-length.
--ANI (Posted on 29-08-2013)