Add WWE Heavyweight Champion CM Punk to the list of people who have engaged in a Twitter war of words with R&B star Chris Brown! Hours after defending his title against Chris Jericho, R-Truth, The Miz, Kofi Kingston, and Dolph Ziggler last night at The Elimination Chamber Pay-Per-View, CM Punk still had some fight left him in and took aim at the singer via Twitter with these words: It didn’t take long for the easily provoked Brown to respond to the wrestler as he launched back with this: and then followed up with: If that wasn’t enough to get people talking, Brown then directed a Tweet towards his former flame Rihanna, wishing her a Happy Birthday using her first name Robyn. CM Punk has yet to respond, but maybe Vince McMahon can get those two in a Wrestlemania no-holds barred match with Rihanna as the special referee? Let’s get ready to ruuuuuuumble!