Mar 4, 2011 10:27 GMT  ·  By
“Till the World Ends,” second single off Britney Spears’ “Femme Fatale” album, is out
   “Till the World Ends,” second single off Britney Spears’ “Femme Fatale” album, is out

Way sooner than expected, Britney Spears has premiered the second single off her upcoming album “Femme Fatale.” It’s called “Till the World Ends,” was written by Ke$ha and is bound to become a hit in the clubs and the party circuit.

It would seem that the song, which was supposed to come out next week, leaked online some hours ago, prompting the decision from Spears’ camp to just come out with it.

“Looks like the cat’s out of the bag,” Britney tweeted after the presumed leak. She then announced she would be releasing the song on Ryan Seacrest, the final version.

“Till the World Ends” is already available for purchase on iTunes – and you can also check it out in the player below.

MTV spoke to Ke$ha about it and she says she had Britney in mind for it all along, that it’s the song of the kind of power an artist who puts on a great gig has.

“That song is me imagining her and any female musician touring the world,” Ke$ha says.

“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,” she adds, referring to the chorus, in which Britney croons about not wanting to stop dancing just because the sun is up.

“I consider myself a songwriter before and above everything else, so it’s an honor to write for one of pop music’s biggest icons. And I hope it gets everyone on the dance floor cuz y’all know that's what K-Monay does best!” Ke$ha also says.

Indeed, “Till the World Ends” is an extraordinary dance track, one of the best to have come out recently, reviewers and fans agree.

The fact that it starts off on a rather misleading note, with Britney deliciously purring in that manner she has, builds up tension and then kicks off thumping, as a “beat the beat” type of track only adds to the pleasure of listening to it, they say.

Below is Britney Spears’ “Till the World Ends,” check it out and see for yourself.