Justin Bieber – Is Proactiv. Hey, guys, its Justin Bieber here. There are some things that come with being a teenager. Feet grow like crazy. I can’t stop that. The hormones kick in. I don’t wanna stop that. And then there is zits. I can stop that. That’s why I use Proactiv. Complete Full Script, Dialogue, Remarks, Saying, Quotes, Words And Text By Justin Bieber – Is Proactiv Commercial.