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.
"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?