Rihanna has forgiven Chris Brown for enjoying a night out in Paris with his ex-girlfriend.

The "Diamonds" singer - who recently rekindled her on-again/off-again romance with the 23-year-old R&B star despite him still being on supervised probation for beating her in 2009 - was said to be livid that he was spotted out on the town with his model ex Karrueche Tran in the French capital on Friday night after his concert. "She can't get it into her head that Chris will never change. She's given him so many chances since he beat her up in 2009 and he still keeps hurting her by partying with girls. Letting Karrueche meet him is yet another blow for Rihanna that will further disgust her fans. They are already raging that she is back with him," a source said.

The insider also revealed that the 24-year-old singer was originally planning to be in Paris with Chris, after joining him in Germany for his Carpe Diem tour dates there earlier this month.

"She was meant to stay with Chris in Paris -- but it looks like she gave it a miss and will head straight to Manchester tonight to perform on The X Factor final's results show," the source added.

Rihanna posted a series of angry tweets that appeared to be aimed at Chris on Friday. "Examine what you tolerate" and "Goodbye muthaf*****," followed by "You give, you get, then you give it the f*** back," she wrote.

Previous reports indicated that Karrueche was only joining Chris on his tour for professional reasons, as she is the designer of the clothing line The Kill and accompanied her brand partner Ugo Mozie, who is also Chris's celebrity stylist, on the trip.

But Rihanna already appears to have forgiven Chris for spending time with the model, as she posted a new picture of her lying in his arms earlier today, captioned, "Damn ....... I miss my n***a #thuglife #BFFlife."