You need to watch the the first two videos below to get the full effect. First is Gabriela Bee singing with Walk Off the Earth as they cover Panic! At the Disco’s song “High Hopes.” It’s a lovely, smile-inducing, catchy performance.
Then, watch the second video, where the teen singer watches a “react” video, where Brendan Urie of Panic! watches the cover of his song. Bee’s absolute delight is a joy to watch, and is also smile-inducing.
And for contrast, the third video is the original by Panic! At the Disco, so you can see how far the interpretation ranged from the source material.