If you were bestowed the honor to perform at a presidential inauguration, wouldn't you want your parents in attendance regardless of their political beliefs? Pop diva Katy Perry doesn't think so, for she told Marie Claire in an interview published Monday that because her parents are Republicans that didn't vote for Barack Obama, they couldn't watch her perform at his inauguration in January: Perry - My parents are Republicans, and I'm not. They didn't vote for Obama, but when I was asked to sing at the inauguration, they were like, 'We can come.' And I was like, 'No, you can't....