Rihanna 'has romance rule'

Rihanna has reportedly said a reunion with Chris Brown is "possible" under one condition.

The pop star and her on-off boyfriend Chris are said to have called time on their relationship earlier this summer.

Sources close to Rihanna wouldn't be surprised if she took her badboy ex back again, although this time there will be one condition.

"[A reunion is] possible," a source told HollywoodLife.com. "He would have to do a lot of work on himself, [Rihanna doesn't] want to be hurt and go back [to] bulls**t. If she keeps going back, she will never go forward."

Rihanna allegedly doesn't feel her life is complete without Chris. The duo, who are both reportedly single, are currently living in different areas of the US. Chris is said to be staying in the West Coast which is close to his other on-off girlfriend Karrueche Tran, while Rihanna is in New York.

The Diamonds singer is apparently open to the idea of dating someone new if Chris doesn't make his big transformation.

"When the right dude comes along, whenever that is, she'll be ready and take her time and make sure it's right," the source added. "But until then, she's not really tripping on a dude."

Meanwhile, Chris has been speaking out about his two former flames. The star told HollywoodLife that he's enjoying the single life and said isn't ready to commit to anyone just yet.

"[Fans have] seen me on and off again with different girls - you know who they are - but right now, as a 24-year-old man, I just choose to be single!" Chris exclaimed previously.