Rappy McRapperson (Joshua A. Katz, born 3 September 1982), known on the streets as ‘Ghost Rappy’, is a Nerdcore music performer and video producer.

He is known for several viral hits, including “My Fanny Pack”, and “I’m A Gangster” which has been viewed over 1,000,000 times, and “Fish Sticks”; He also wrote and performed 22 songs for the popular series of children’s books called Captain Underpants and wrote music and skits for the PBS educational television program Biz Kid$ in 2007.