Britney Spears' new single named

Britney Spears' new single will be called Get Back.

The singer is said to preparing to release her first song since 2005 in the next few weeks and has a "surprising" new sound.

A source said: "It's a very new sound for her. I think people will be surprised."

Britney has been working with music producer Sean Garrett - who has previously collaborated with Beyonc? Knowles, Jennifer Lopez and Mary J. Blige but it is yet known if he has produced her comeback single.

It had previously been reported Britney was set to release a single from her new album last Saturday (07.07.07).

The 25-year-old has already reportedly treated some fans to a sneak preview of her latest record.

Dancers were asked to perform to a track from Britney's new album during tryouts to find two new male backing dancers last month.

One dancer said: "It was dope. It reminded me of that one song you hear at 1.50am, when they call last call at a club, and it's the hottest, nastiest song you've ever heard in your life and you've just got to put your drink down and dance to it. You've got no choice. Your body is insisting on it."

Britney, who had hoped to have her album out by the end of this year, was recently left frustrated to discover the release date has now been pushed back to 2008.