Los Angeles: Singer Rihanna`s tweet has sparked speculation that her rumoured relationship with Chris Brown has come to an end.
The singer wrote on Twitter: "Being single sucks. The only thing I get to do anymore is whatever the f*** I want to do."
Rihanna had grown closer to ex-boyfriend Brown in recent past. He was accused of physically assaulting her in 2009.
Brown was recently seen partying with many girls in Paris and invited his ex-girlfriend, model Karrueche Tran. This upset Rihanna.