It's battle of the divas…although Mimi might just win this by eating Rihanna

A source tells Page Six that while Rihanna was in attendance at the M2 Ultralounge Halloween party hosted by Mariah Carey, the Barbados native did her best to avoid the busty Mrs. Nick Cannon.

The snitch claims, “It was Mariah’s party, but Rihanna didn’t want to be seen with her. And Mariah was not going over to greet Rihanna. Mariah needed six guards to clear a path to the bathroom so her wings wouldn’t be dislodged.” And Rihanna was also in high-maintenance mode, as it turns out, requiring a security guard to hold up her long tiger’s tail.

However, a rep for Mimi claims that the only reason Mariah never greeted Ri-Ri was because of the crowd of 1,000 party attendees. The rep added, “She heard a rumor that Rihanna was there but she never saw her. She loves Rihanna and of course would have said hello.”

Here’s Rihanna with her scary lioness mane and her pointy, braless boobs leaving her hotel and heading to 4040 Club in NYC to blow off some diva steam.