Star Magazine Reports March 4th issue:  When it comes to Chris Brown, Rihanna is determined to prove her haters wrong. After flaunting her diamond engagement ring from Chris, 23, at the Grammy Awards in February, the “Stay” singer, 24, is planning the wildest nuptials in showbiz history. “They want tattoo artists, fire breathers and a near-nekked waitstaff,” says a source. “They’re even talking about having pre-rolled joints at the reception!” The wedding, which is rumored to be happening in Barbados at the end of July, will be “all about swagger, bling and sin,” says the source. “They want to celebrate their relationship with people who believe Chris has changed.”…