Yep, we’re crying. As if we weren’t already confident enough that their relationship was super-close, now we know how strong their bond truly is.Twitter contentView on TwitterThis isn’t the first timethey’ve commented on their tight-knit friendshipDuring Taylor’sReputationtour back in May,Selena joined her BFF live music in the lobby of the Montage Hotel; usually the world's most famous (and occasionally infamous) pop star is not the one making it.Instagram contentView on Instagram " we're reminded of the fact that it's important to live in the moment, to savor our surroundings, and appreciate the lives we have while we have them.You can watch "Seventeen"in full herebut make sure you have some tissues nearby.ContentView Iframe URLRelated: "I love going to festivals and concerts. I’m going to Hard Summer Fest, and I’m so excited. I’ve been to Coachella before, which has kinds of a hippie vibe, but this one’s dance music so it’ll be totally different."5. Press play on a great soundtrack: