The 16-year-old singer - who was recently honoured at Variety magazine`s 4th Annual Power of Youth event in Los Angeles - is delighted that he is able to use his celebrity status to help other people.
Speaking at the event, he told US TV show `Extra`: "I think that I`m pretty powerful, I guess.
"I think that being powerful you have to do something good with that power. We`re helping build schools, we`ve already built fifteen with the charity Pencils for Promise. We just like the fact that young people can help out young people."
The teenage star has also laughed off reports he is dating Jasmine Villegas, who starred in his `Baby` music video, insisting he will always be honest about his personal life.
When asked about his love life, Justin said: "I think that whatever happens, happens, y`know. I`m not scared to tell the truth. No, I`m not dating anyone at the moment."
Justin is also excited about his forthcoming book `First Step 2 Forever`, because it gives him the opportunity to properly express himself.
He added: "It`s not really an autobiography. I just wrote this book about my journey so far, it`s called `First Step 2 Forever`, meaning like this is only the beginning, there is so much more to come.
"I`m really excited I got the opportunity to write a book and express my feelings about what`s going on."