. ♪ >> reporter: the kids call him mister b. explore not only lyrics, harmony and movement, but also the benefits of hard work. >> i try to be there for these kids. so i try to assume that all these kids need that extra, that extra pat on the back, that extra bit of motivation, that extra bit of inspiration that says "hey, you're doing something really special you know, and i'm really proud of you," and that's my most important role. >> all right, before we leave today, i want to just go over the new chorus that we learned today. >> reporter: it's their moment to shine before heading on to middle school. every year mr. b auditions a new group of fifth-graders at p.s. 22. but each song will live on, not only on youtube, but also in the confidence and memories these young performers will take with them. ♪ >> one lesson that i've really learned is that when you try and try your hard work always pays off, and you just keep shooting for the stars. ♪ >> great job today. [ cheers and applause ] >> reporter: want to hear more? just type