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Singer Chris Brown had no idea that his former girlfriend and singer Rihanna had already moved on, said a source.

“[Brown] was actually texting her for months and even thought about trying to win her back. But now, he feels like a chump because he had no idea she had a man. As far as Chris knew, she was single,” said a source.

However, the Privacy singer wasn’t worried about Rihanna’s relationship with the 29-year-old billionaire, Hassan Jameel.

“Chris isn’t going to lose sleep over Rihanna’s new relationship because he doesn’t even think it will last,” the source said.