She’s known as Ivy Supersonic (aka: Ivy Silberstein), and is a member of the Howard Stern Show’s group of extras called the “wack pack.” Ivy has just pleaded guilty to harassment and identity theft in a Manhattan court. She was accused of putting glue in the door locks of a New York City nightclub, and of using her stepmother’s credit card without consent. As a part of her plea deal, the 42-year old will perform 20 days of community service, submit to an anger-management class, and pay $4,500 in restitution.