He probably wouldn't look like Justin in any way when you'd see him walking down the street but his Justin Bieber-like twinky face would make you think otherwise.
If there wasn't a side-by-side pic, most people would think that's Bieber. And to be honest, I wouldn't be surprised if that was Bieber playing games on his fans. That boy looks TOO MUCH like Bieber, especially in the very first pic.
They have a really fair resemblance but for most parts I can easily tell which one is Katy and which one is Zooey. This case tho that we have right now is just