Britney Spears continues to build anticipation for the March 29th release of her album Femme Fatale with news that a track written by Ke$ha called Till The World Ends may be the next single, according to MTV News.

When asked about the upcoming single, Ke$ha, who had previously sung backup vocals for Britney's song Lace and Leather, says:

    "That song is me imagining her and any female musician touring the world. You know, when you go out, and you're having an amazing, magical night and you don't want to go to sleep and you want it to last until the world ends."

Till The World Ends is expected to hit radio stations March 11, and on the single's cover art, Ms. Spears looks deliciously classy in a sweater, short shorts and heels.

Hold It Against Me has already busted all kinds of records, and earlier this week, we got a taste of another single called I Wanna Go.

We can't wait for this album and the new track! Listen to a snippet below.

Till The World Ends by

Larry Rudolph, Brit's manager, recently spoke to MTV about his excitement for Till The World Ends. Find out what he had to say ... after the jump.