Demi Lovato and 'Glee' star Darren Criss collaborated on a duet of 'Skyscraper' for We Day 2013 -- and it was beautiful!

With Criss at a piano, Lovato belting her heart out and the Kenyan Boys' Choir harmonizing behind her, it was a moving and meaningful performance.

This probably won't be the last time Lovato and Criss share a song. Since she's got an important guest arc on 'Glee,' we bet they'll serenade one another on set at least once!

We Day is an annual kids' celebration held through Free the Children. The 2013 event was held specifically for kids who performed charity work, as Lovato explained in a tweet:

Lovato is a perfect fit, as the 'Staying Strong' author is all about empowerment and bettering one's selves.

And let's be honest: We bet those kids feel even better about giving back now that they got the chance to see a superstar like Demi live!