Bar Refaeli -- Leonardo DiCaprio Should Bang Rihanna ... And If He Doesn't, I Will!

TMZ

Bar Refaeli is giving her ex-bf Leonardo DiCaprio the green light (not that he needs it) when it comes to hooking up with Rihanna ... because, well ... LOOK AT HER! We asked the supermodel about what our sources saw go down at the Playboy…

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