(Cover) - EN Showbiz - Ke$ha says it was an honour to write a song for Britney Spears.

Britney is due to release her seventh studio album, Femme Fatale, later this month and has collaborated with a host of big names. Pop star Ke$ha has penned Till the World Ends, which will be Britneys next single. The up-tempo dance track was posted on Perez Hiltons website yesterday afternoon and Ke$ha is thrilled with the response to the song because she is such a huge Britney fan.

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

The lyrics to the energetic party song see Britney encouraging people to dance till the world ends.

"This kitten got your tongue tied in knots I see/ Spit it out 'cause I'm dying for company," she teases later on.

The 29-year-old superstar is fiercely proud of her new record and has claimed some of the songs are revolutionary.

Britney who teamed up with stars including will.i.am and Rodney Darkchild Jerkins for Femme Fatale believe her latest material proves she has evolved as an artist.

I wanted to make a fierce dance record where each song makes you want to get up and move your body in a different way, she told V magazine. This record is for the clubs, or something you play before you go out at night. Its definitely my edgiest and most mature sound yet. (C) Cover Media