According to Rihanna, Katy Perry and Lady Gaga must be texted prior to every red carpet event. Why? So they don’t end wearing the same neon wack-a-doo frock as their friends! Says Rihanna, “My worst nightmare would be a clash on the red carpet - so we all text each other before to make sure.” But the clash of Rihanna’s hair and everything else on the planet, that one’s okay? “We’re all kind of fearless with fashion. So Katy and I speak all the time about what we’re going to wear. And Gaga,” Rihanna explained. AND GAGA? No offense, Rihanna, but Gaga would look at your text, de...