Is Katy scared of Twitter?

Move over, Justin Bieber! Katy Perry just passed the singer to become the most followed person on twitter, with over 48 million followers. But with great power comes great responsibility and that freaks the "Uncondionally" singer out. "It's terrifying," she says. "Sometimes I just want to post pictures of really stupid stuff but I have such a responsibility no one runs it besides myself." Keep the tweets coming, Katy!