The 'Diamonds' hitmaker has allegedly tattooed the word to honour her on-off musician boyfriend, who famously calls his army of fans Team Breezy, reported Sun online.
"She got it to symbolise her commitment to him. Now the world knows they're back together, they're determined to make it work," a source said.
The couple, who split in 2009 after Brown violently assaulted Rihanna, are thought to have rekindled their passion after Brown dumped model Karrueche Tran.
Since then they have become inseparable, with Rihanna, 24, even flying out to Germany to spend time on tour with him.
