Having UFC women's bantamweight champion Ronda Rousey on your bad side isn't the best idea.
But that's where pop icon Justin Bieber currently finds himself, as "Rowdy" says she is no longer a "Belieber" after the singer snubbed her -- and her little sister -- at the Cannes Film Festival.
She dished the dirt to Cosmopolitan.
"My little sister is very hard to impress. We really didn't care about anybody that was at the Cannes Film Festival, but I wanted to spend some time with her. Justin Bieber was over there taking some pictures with some ladies and she suddenly got really excited and was like, 'Do you think he would want to take a picture with me?' And I was like, 'Sure Julie, everybody is taking pictures today, don't feel bad about it at all. That's why everybody's here. Don't worry about it, he's a sweetheart.' So I walked over there and I said, 'Excuse me.' And he said, 'I've already taken a billion pictures today, Okay!' And I'm like, 'Yeah, but she's the only 16 year-old at the party.' I only got the 'Yeah but' out and he said, 'A billion!' And he walked way and totally snubbed my sister. She looks at me on the verge of tears and she goes, 'I'm no longer a Belieber.' Yeah, I don't think I'd want to hang out with him. I'm not a Belieber. I was, but I am not anymore."
Rousey vs. Bieber? I'd pay to see that.
In all fairness, "The Biebs" -- who is chummy with Rousey-hater Floyd Mayweather -- probably wasn't having a good day, as the megastar is constantly being mobbed by his legions and legions of fans. Still, "Rowdy" probably won't be getting an apology from the singer like the one Dana White received from another pop star who was being a "dick head."
Don't worry, Ronda, you still have "Queen Bey" on your side.