They grow up so fast.
But, after everything that's happened recently, what more could the singer want for his birthday? Need a refresher on what we're referring to?
First of all, One Direction rocked the MTV Video Music Awards, winning multiple Moonmen and rocking the hallowed VMA stage for the first time. And, most importantly, while snagging one of their trophies, Horan scored a lip-lock from presenter Katy Perry.
What a slick fellow!
So, you tell us, Niall, what more do want?!