Ke$ha 'honoured' to work with Britney

Ke$ha said that she is 'honoured' to work with Britney Spears on her new album.

The singer co-wrote the track 'Till The World Ends', the new single from 'Femme Fatale'.

She told MTV: '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.

'And I hope it gets everyone's ass on the dance floor 'cause y'all know that's what K-Monay does best!'

'Femme Fatale' is due out on March 28th.