A Florida woman charged with attempting to murder Rihanna appeared in court to enter a not guilty plea Wednesday. Ivanna Lisette Ortiz, 35, also pleaded not guilty through her lawyer to more than a dozen other felony counts in Los Angeles Superior Court, The Associated Press reports.Ortiz was charged with attempting to kill Rihanna, along with 10 counts of assault on a person with a semi-automatic firearm and three counts of shooting at an inhabited vehicle or dwelling, according to the Los Angeles County District Attorney's Office.