It still blows our mind that this lady is only 19 years old! Far cooler than us!

This image appears in the gallery:
Summertime Ball 2017 Live: The Best Photos From On Stage At Wembley

1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 

10. 118 images

See the full gallery: Summertime Ball 2017 Live: The Best Photos From On Stage At Wembley