According to her Twitter account - the reality star lashes out on Rihanna! 

She says,  "Ugh.so over Rihanna! She's lacking some type of endearing quality about her. She shoulda spoken about this 2 help women, instead of partying or showing off her gun tattoo's..ohhh she's soo cool! She should be a better role model instead of taking advantage of chris bad rap - bitch is lovin the fact that she has world at her feet like "aww poor RiRi" but she's not speaking out and not sincere in her actions - if that happened 2 me, I woulda went on oprah or Tyra to tell young women that this is not ok N what he did was wrong. But she loves it - Her fans who look up to her should hear at least a "Thank you for all your support through this hard time and this has been tough? etc. Nope! - Hey. I can say whatever I want. Freedom of speech remember? I've been through an abusive relationship so I understand. But her message now..and the fact that she hasn't acknowledged it..lets young boys think that ITS OK to beat a woman. and IT IS NOT! She's not empowering females

I guess she just had to vent!