AITAH for uninviting one of the groomsmen's girlfriend from my wedding?

My husband to be, M, and I have been together for 5years but officially engaged for a year. M had his bachelor party this weekend. A groomsmen of his has a girlfriend, we'll call her CC, that is friends with M's exgirlfriend. I have never held a grudge against CC for being friends with Ex but I have made it a point to not get too chummy with CC as she is a huge gossip in the family and has had issues with nearly all the women at some point of telling other peoples bussiness. I NEVER talk about why I don’t deal with her and I never exclude her on the rare occasion I host something. I’ve always just stayed quiet about it because I feel like everybody knows how she is and they tolerate it because they care about the cousin/groomsman and at the end of the day she isn’t my problem so I’ve never felt the need to actually address it but last night was way too much. I was woken up in the middle of the night from a facebook message and 2 phone calls from 3different people about how CC and Ex were together and CC was drunk, mad about the bachelor party and was trying to find out where the guys were because she wanted to pull up on them and ruin their night out. I was/am enraged. I know CC knows I dislike his ex and all the drama behind why, and CC knew that at some point the guys were gonna do something together for a bachelor party. For her to start drama, acting all crazy trying to find the guys WHILE she is with Ex? Too over the top for me, too disrespectful in my eyes. So she’s uninvited. Shes trying to shift blame because that's what she always does but I don’t really care about the reasoning behind her blow up, how she went about it was wildly disrespectful to me. AITAH?