Chris Brown is prepared to propose to MARRY Rihanna tonight - at a midnight dinner in Hawaii (4am CST??)

According to MEDIATAKEOUT.COM , Chris already ASKED RIHANNA'S MOTHER AND FATHER for PERMISSION to propose to their daughter - and we're told that they HAPPILY AGREED. And the rock . . .. well MediaTakeOut.com's snitch tells us that the diamond is a 10 CARAT rock, worth an estimated $3.5MILLION

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