Rihanna--I'm a Rockstar, NOT A PARENT!!!

Rihanna is lashing back at the people criticizing her violent new music video for "Man Down" -- scoffing at the notion she's a role model ... saying, "What's up with everybody wantin me to be a parent?" Rihanna tweeted, "I'm a 23 year old rockstar with NO KIDS! What's up with everybody wantin me to be a parent? I'm just a girl, I can only be your/our voice!" Why does Rihanna seem so upset with wanting to be a parent?