Chris Brown and Rihanna split three years ago after Brown's assault on the 23-year-old songstress, but now the two are secretly hooking up again, according to Us.

After the assault, the courts made sure to keep the former couple apart. However, with the court order lifted, sources say the twosome have been getting together for almost a year. A music industry exec tells the mag:

    "They can't get enough of each other. I don't see it ending well."

The source close to RiRi adds:

    "Rihanna loves to live dangerously, and talking to and hooking up with Chris is all part of that."

Brown, 22, is reportedly dating model Karrueche Tran. His rep tells the mag, "He and Rihanna are just friends. He's not cheating."