Sometimes celebrities are recognized for things that most people wouldn't be proud of. But every now and then, they do something that is heartwarming and beautiful, using their celebrity status to help others. That is exactly what Katy Perry did earlier this week for a young girl named Jodi.

Katy Perry joined stars such as Jon Stewart, Tina Fey, Seth Rogen, Carly Rae Jepsen and more for the taping of Comedy Central's Night of Too Many Stars: America Comes Together for Autism Programs, which will air this Sunday. The show benefits autism programs across the country, and raised over $3.1 million in 2010.

The highlight of the show wasn't the hilarious comedic performances, or the long list of celebs in attendance, but the performance of Jodi DiPiazza. Jodi is a young girl with autism who professionals never thought would speak properly, and found her outlet through music. Jodi's passion for music was noticed and she is now thriving, studying piano and voice at New York’s Mannes College of Music Prep.

Jodi got the chance to not only bring awareness to autism, but show her talents as well at the recording of the event. She got the opportunity to duet with Katy Perry on her inspirational hit 'Firework'. Jodi played the piano and sang effortlessly and beautifully with Perry chiming in with beautiful harmonies. The performance brought everyone in the audience to tears, including host Jon Stewart who had to regain his composure before continuing on with the show. Jodi jumped up and held on to Katy Perry while the audience stood and cheered, and they took in the moment together.

Katy was probably the most touched person in the entire audience. After the show she tweeted: 'I will never forget last night. It was the most important moment thus far of what I do.' She later posted: 'Jodi is my firework.'

Be sure to catch 'Night of Too Many Stars' on Comedy Central at 7 p.m. Sunday.