Who is hotter?

Okay, for our first 'Who's Hot?' we have Australian actor, Callan McAuliffe. He's played in great movies such as Flipped and I Am Number Four. Yum.
Or British singer Niall Horan. Let's be honest, we all know where he's from. But in case you don't know, it's One Direction.

So, comment and tell me who you think is hotter and next week he'll go against someone else until we have a winner!! Comment please!!