1. When they won their first Brit Award, and Jade said this during the acceptance speech.
2. And then the next day Perrie said her "heart was full."
3. When Perrie and Jesy were every pair of BFFs attempting to nail that selfie.
4. When Perrie burst into tears on stage days after splitting from Zayn Malik and the girls formed a circle in order to console her.
5. And when she was asked about the split during an interview, the other girls jumped in to make it clear they wouldn't be speaking about it.
6. And then Jade proved herself to be the ultimate in supportive friend goals by adopting this sign.
7. When Leigh-Anne forgot the order of the alphabet and the girls couldn't help but seriously crack up.
8. When Perrie paid tribute to her bandmates on their fifth anniversary with the most lovely message.
9. And when she wished Leigh-Anne a happy birthday like this.
10. When Katie Hopkins decided to attack them for no reason.
And so Jade clapped the hell back in support of her bandmates.
11. When a journalist probed Perrie and Jade about Jesy's possible breakup.
And like the true friends they are, refused to speak about the subject.
Jade even grabbed the interviewer's questions and threw them across the room.
Before Perrie ensured the conversation moved swiftly on.
And called him a "smart arse."
12. When Perrie was full of praise for Leigh-Anne's vocals.
13. When Jesy got engaged and Jade posted the sweetest message.
14. When Jesy and Jade proved they're so in synch that even their pyjamas match.
15. When Leigh-Anne called her girls "rocks, saviours and sisters."
16. When they posted this photo on Instagram, explaining why Jesy had been cropped out.
But people still speculated that they'd had a row.
So Jesy and Perrie proved that nothing would ever get in the way of their friendship, and posted this Snapchat of their sleepover.
17. When Perrie was asked how she was finding the media attention surrounding her and Zayn and she gave this answer.
18. When Jesy had to pull out of a performance so they got a cardboard cutout of her.
19. When Jade was asked the secret to their friendship and she gave this perfect answer.
We're just a bunch of four weirdos who have the best connection ever. To be honest, we're just so bloody lucky that we got thrown together and that we genuinely get on. We trust each other a lot and look after each other. We know that whenever something bad happens we can always go to one another to talk about it. We've all got each other's backs. I think that's the key in a friendship; loyalty and trust. We have that massively.
20. And when Leigh-Anne was asked about their friendship and her response was just as cute.
If we didn't have that friendship it just wouldn't work. We're the best of friends. And that's the most amazing feeling, to know that I've got three girls that I genuinely love to be with. The band are like my family and I don't know what I'd do without them.