1. When he documented his bum getting tatted.
2. When he told us how ridiculous cuffing season is.
3. When he sang the most perfect note in 'Love You Goodbye.'
4. When he calls the fans 'love'.
5. When he pretended to be a cat.
6. When he was singing karaoke.
7. When he took a selfie with his baby brother, Ernest.
8. When he proved to be exceptionally adorable in this Christmas jumper.
9. When he paid a visit to Eden and proved he did more than just sing.
10. When he was on stage looking cheeky as ever.
11. When he was busy causing trouble in hotel rooms.
12. When he promised One Direction would be back from their hiatus.
13. When he was shirtless.
14. When he became a guest judge and took us back to his roots.
15. When he discovered emojis.
16. When he brought out the sass not once.
17. Not twice.
18. But three times.
19. When he tweeted this gem.
20. When he dragged Naughty Boy down and the fandom rejoiced.
21. When he got in a water fight and proved LiLo was real.
22. Not to mention when he was writing big hits with Payno.
23. When he made us feel all the feels with this group hug.
24. Last, but not least, when he showed us how much he cared.
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