The "Little Things" hitmaker has had an "incredible" time since finding fame with the boy band but has not changed with success, reported Contactmusic.
" What's happened over the last few years has been incredible. But I just stay the same person I was and grow up with it. We are just normal people doing this abnormal job," he said.
The 21-year-old singer also thinks he is the "worst celebrity on earth" because he hardly gets clicked when he is not working.
"To be honest, I don't get that much paparazzi because you can stay away from it if you want to. I am probably the worst celebrity on Earth, cos I don't go to any of those parties," said Horan.