Must Watch! Katy Perry's Tear-Jerker Duet

Is it possible to watch Katy Perry and young musician Jodi DiPiazza sing Firework without crying? Maybe, but we don't think so.

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During Comedy Central's Night of Too Many Stars: America Comes Together for Autism Programs, airing Sunday night, the audience heard DiPiazza's story about living with autism and using music as an outlet to express herself. There was even a point in the young girl's life where it was thought she wouldn't speak, but nonetheless, the walking miracle shared the stage with Perry for a heart-tugging duet.

Grab the tissues and get ready for the waterworks when the ladies perform about 3:30 minutes into the piece. The Night of Too Many Stars is a charity event to raises funds in support of autism schools, programs and services all over the country.