Two of the biggest names in pop and on Twitter, Britney Spears and Rihanna, have been teasing their fans with tweets between the two pop princesses about a possible collaboration.

Britney Spears who tweets as @britneyspears and Rihanna who tweets as @rihanna, have sparked the rumours of the duet after a series of tweets and cryptic messages began between the singers.

Rihanna was the first to set the ball rolling tweeting: I got a #SEXY collabo comin your way sup dupa soon!!! OH YEAH!!! By Popular demand...”

Fans were left wondering who could be joining Rihanna in her latest project, however they only had to wait an hour before Rihanna tweeted: “Its BRITNEY BITCH!!!!”to fans on April 10.

She added: “Britney Spears one of the biggest worldwide popstars! Epic...majah Rihmix to S&M majah!!! S&M rihmix now that's too much sex in the air. Think u can handle it?”

Britney Sears then got in on the tweeting action replying to the Umbrella stars posting saying: “You're such a tease! I like it, I like it...You think they're ready Ri Ri?”

Fans of the stars were quick to show their approval of the collaboration with some comments including “Omgg, Rihanna And Britney on S&M, give it nowww, I'm so excited!!” and “Love that Rihanna & Britney are collaborating – two big artists, one big song. I'm ready for it, are you?”

The duet comes as no real surprise after Britney Spears revealed on Captial FM here desire to work with Rihanna and pop sensation Lady Gaga. She said: “I feel like we actually need to come together and do a song that can actually show how much power we do have – an idea like that would be astounding.”