. >> reporter: all the other celebrities include tori amos, who was moved to tears when the chorus sang music. ♪ just stay a while, stay a while, stay a while ♪ >> reporter: a link to this scene on a popular blog sent p.s. 22 into the internet big time. ♪ stay a while and on to television and stage appearances like this one with the band crowded house. ♪ try to forget you make me call your name and i'll shout it to the blue summer sky ♪ >> reporter: the teacher that makes it all happen is gregg breinberg. p.s. 22's fame is thanks to his ability to help the kids really feel the songs they're singing. ♪ time makes you bolder, even children get older ♪ >> i encourage them to find a musical connection to every song we do. we'll discuss lyrics. we're doing music that is emotionally sophisticated, and what's great is that these kids have kind of an emotional experience behind them that, again, when they bring it to the table, they're putting something out there that's behind the notes, behind the rhythm. you can't miss it. you can't miss it. you see it, you can't miss it. ♪ >> reporter: the k