We’re all pretty much living for Demi Lovato and Ariana Grande‘s friendship. We mean, any time two of our favorite stars become close, it’s always a magical time — but their relationship is something truly unique. These ladies have been through so much together, and they always have each other’s backs. They’re constantly hanging out, defending each other on social media and gushing over each other’s work, so yeah, we’re all striving to find a friendship like theirs!

And get this, you guys — Demi turned 27 on August 20, 2019, and she decided to celebrate her birthday with the “Thank U, Next” songstress! Yep, the former Camp Rock star flew to London and spent her b-day rocking out to Ari’s tunes at her Sweetener Tour, and it looked like she had so much fun. And want to know the sweetest part? Before the Victorious actress hit the stage, she made sure to give Demi a special birthday shoutout. She dedicated her before show prayer to her BFF! Awww, how cute?! And afterward, they hung out backstage, and Ariana even brought out a cake and sang “Happy Birthday” to the “Tell Me You Love Me” songstress.

Clearly, the two pop stars are very tight, and if you’re anything like us, you’re probably wondering how their friendship developed and evolved. Lucky for you, we’ve put together a complete timeline so you can be just as obsessed with this duo as we are.

Scroll through the gallery to see a complete history of Ariana and Demi’s epic friendship.

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