Icelandic pop star Bjork refuses to take illegal substances because her shy nature can't handle mind bending drugs. The singer once took acid, and the 'trip' convinced her she should stay clear of drugs. She tells gay magazine Attitude, "I once tried half an acid and I decided never again. I'm such an introverted character, it really takes a lot for me to be extroverted. "It (acid) just totally isolated me and I was not in touch with anyone in the room and I couldn't speak to anyone and I was in another galaxy. "Those kind of drugs are more for... I'm introverted enough as it is."