If you're slightly delicate from last night, or have a thin skin, you may find yourself a little teary by the end of this. Jon Stewart hosted the Night of Too Many Stars to raise money for autism programs, schools, and services all over the US, with a whole host of celebrities taking part and is set to air over there on Comedy Central tonight. This sneak peek features Katy Perry and Jodi DiPiazza, who is autistic and one of Perry's biggest fans, and would melt the iciest of hearts.