Singer/actress Beyonce Knowles sometimes becomes so upset by unwanted media speculation about her private life she wants to "kill somebody". The Crazy In Love star admits she has learned to live with being a paparazzi target. Knowles tells US magazine Vibe, "Everybody messes with celebrities. At a point, you just have to decide if you really want it. If you do, you have to have a tough skin. And after you get a certain amount of success, you have no choice. "Either you're gonna turn to other things to take away the pain you feel, or you have to deal with it and move on. "If it's something about my sister or my nephew or it's something evil, then yes, I'm upset. I wanna kill somebody. If it's a rumour that's vindictive, or something harmful, or something everybody's believing that is completely not true, then it's frustrating because there's nothing you can do about it. "If someone misquotes you, or says some complete lie, and then they go back and retract that, people still don't believe you didn't say it. "So sometimes it hurts. Sometimes I wanna cry. Sometimes I wanna scream. Sometimes I wanna curse people out."