Shay Astar (born September 29, 1981) is an American actress, singer, and songwriter. She is best known for her work in the late 1990s, portraying the neo-feminist August Leffler , a semi-regular character on the sitcom 3rd Rock from the Sun . She played Elizabeth in the Halloween comedy film Ernest Scared Stupid and Paula Kelly in the Boy Meets World episode "I Am Not a Crook". Astar portrayed Isabella, the imaginary friend of a young girl aboard the Enterprise in the Star Trek: The Next Generation episode " Imaginary Friend " in 1992. In 1996, she played Andrea on the cartoon series The Oz Kids .