Tearjerker Alert: Katy Perry’s Duet with a Young Autistic Girl [VIDEO]

Here's a great sneak peek into what you can expect if you watch Comedy Central's "Night of Too Many Stars" on Sunday, October 21st at 7pm.  "Night of Too Many Stars: America Comes Together for Autism Programs" is hosted by Jon Stewart and raises money for autism programs, schools, and services all over the country.

Get the tissue ready to watch a the story of a young autistic girl, Jodi DiPiazza, and see her sing "Firework" with Katy Perry at the Beacon Theater in New York.