- Click to Subscribe to ClevverMusic! Britney enlists the help of Ke$ha for her next single! Stay here on ClevverMusic for the full story. Hey guys, I'm Bridget Daly with your Britney Spears update for the day. Her next single off the upcoming album "Femme Fatale" has officially been announced. The name of the track is "Till The World Ends," and it was reportedly written by none other than Ke$ha! K-money penned the single with Dr. Luke and Max Martin and told Spin magazine it tells the story about Britney touring around the world with another female musican, and they're having such an amazing, magical night that they don't want it to end. The cover art for "Till The World Ends" leaked online via a French site called Deezer, and according to their sources the single drops on March 14th. However, there's speculation the song could come out sooner. Either way, it's coming soon, so get excited! We're stoked to hear this collabo between Brit and Ke$ha. In related news, Travis Barker also makes an appearance on one of the tracks—producer Rodney Jenkins wouldn't give up any info on that, but said it definitely took both Brit and Travis way out of their respective boxes. Brit also released a snippet of yet another song off the album, a slower ballad called "Criminal." This album is shaping up to be pretty epic. And the news just seems to continue rolling in, so click subscribe to stay posted on the latest. For ClevverTV, I'm Bridget Daly and I'll be back soon!