Singer Rihanna has responded to the criticism she has received for her new controversial music video Man Down, insisting 'this is the real world'. Taking to her Twitter page yesterday the 23-year-old claimed she was a 'rockstar not a parent' and that she had 'the freedom to make art'. The Parents Television Council slammed the Barbadian beauty's video for showing a 'cold, calculated execution of murder'. The clip shows her taking revenge on an alleged rapist by gunning him down. But Rhi Rhi, who is herself a victim of domestic violence, disagreed with the comments. She wrote: "I'm a 23 year old rockstar with NO KIDS! What's up with everybody wanting me to be a parent? I'm just a girl, I can only be your/our voice! "Cuz we all know how difficult/embarrassing it is to communicate touchy subject matters to anyone especially our parents! "The music industry isn't exactly Parents R Us! We have the freedom to make art, LET US! Its your job to make sure they don't turn out like US."