The ‘We Found Love’ singer, who turns 24 on February 20, invited her former partner to a star-studded bash at her Beverly Hills mansion on Tuesday (February 14).The couple separated in 2009 after Brown assaulted Rihanna, receiving five years’ probation and six months of community service.They were believed to have reunited recently, though the state of their relationship has been disputed after Rihanna condemned Brown’s romance with model Karrueche Tran.An alleged partygoer tweeted after the party: "If Cupid was here he would be very happy everyone @Rihanna birthday party was coupled up."All I can say, Chris was invited and she (Rihanna) was acting like the happiest girl on her birthday and probably got what she asked for.” The Mirror.