RIHANNA & JESSICA BIEL TO GET IT ON OVER JUSTIN!

In this week's issue of Star Magazine - and in it they're talking some DRAMA!!!
According to the mag, Rihanna and Jessica Biel are planning on fighting each other. Here's an excerpt:

"Jessica has been so upset over Justin and Rihanna, and flew to New York to confront her," says an insider close to the actress. "She wanted to intimidate Rihanna, hoping to make her stay away from Justin."

But Rihanna doesn't scare easily ... The R&B singer laughed when she found out Jessica, 27 was in town. "Rihanna bragged, 'If I run into Jessica, I'm going to tell her the truth about me and Justin and what happened between us,'" says a friend.

Luckily the two didn't cross paths then. But according to the magazine, the next time Jessica sees Rihanna, it's ON AND CRACKIN!!!