rihannaRihanna is reportedly considering getting back together with her boyfriend of nearly a year Chris Brown - despite allegedly assaulting her earlier this month.

Last week, a Los Angeles Police Department evidence photo was leaked, showing Rihanna bruised and bloodied as a result of the incident after Clive Davis’ pre-Grammy party a fortnight ago. Chris was arrested hours after the episode, which is said to have happened in his car, and charged with a felony level count of making criminal threats. The LAPD are said to still be pursuing a battery charge but are finding it difficult to collect evidence that would ensure a conviction.

Both Chris and Rihanna went into hiding after the incident - but after laying low for ten days, Rihanna attended a party at a private house in the Hollywood Hills on Friday night to celebrate her 21st birthday.

A source at the party told the New York Daily News that the party was a celebrity-free zone but Chris did phone: “Chris called Rihanna to wish her a happy birthday.”

The source added that he had also sent over a diamond bracelet and necklace for her big day, and his mum Joyce also sent a bouquet of flowers: “He’s absolutely trying to get back into her good graces.

“He knows he’s very much in the doghouse right now, and is doing everything he can to show her how sorry he is.

Rihanna so wanted Chris with her on her big day, but obviously realizes why they can’t be together right now. But it’s becoming more and more clear that she can’t be without him.”

After the party, which was “Blackjack 21″ themed, Rihanna flew back to her native Barbados to spend the rest of her birthday weekend with her family.