How Selena Gomez Left Taylor Swift Completely Sobbing

This friendship is tear-worthy.

Selena Gomez made Taylor Swift cry but for all the right reasons.

At the 2014 American Music Awards, Selena gave an emotional performance of "The Heart Wants What It Wants," and it clearly made her friend of eight years teary-eyed.

Turns out there was even more crying than what we saw. "When I performed 'The Heart Wants What It Wants' she was like sobbing backstage and she's like, 'I'm so proud of you, that was everything I always wanted people to see about you', and it's just like really cool. She's incredible," the former Disney star told Manchester's Key 103 Radio Station

And the 23-year-old couldn’t stop gushing about her BFF. "Taylor's just been such an incredible inspiration and she's just like one of my biggest supporters," Selena continued. "She has always wanted to see me find what makes me different and never forced her opinion too much; she would just tell me what she believed and what she thinks I should do."

WATCH: Selena Gomez Impersonates Taylor Swift 

The "Shake It Off" singer isn't shy when it comes to advice, even for strangers. Last summer, she provided love advice to a fan named Hannah who had "the biggest crush in the whole wide world," but unfortunately, the crush had a girlfriend. Taylor was quick to respond on her Instagram with some encouragement. 

"I think unrequited love is just as valid as any other kind," the 25-year-old wrote on Instagram. "It's just as crushing and just as thrilling. No matter what happens in this situation, I want you to remember that what you are doing is selfless and beautiful and kind. You are loving someone purely because you love them, not because you think you'll ever have your affections reciprocated. You are admiring something for its beauty, without needing to own it. Feel good about being the kind of person who loves selflessly. I think someday you'll find someone who loves you in that exact same way."

WATCH: Godmother Taylor Swift Delivers Sweet Dedication to Jaime King's Baby 

Wise words, Swift!

We could all use a good gal pal like her in our lives. It’s no wonder her squad keeps growing every day and even includes Julia Roberts now!