Wow this is so amazing and inspiring!
Some incredible children at the Children’s Hospital at Dartmouth-Hitchcock in New Hampshire made the most impeccable lip synch cover of one of the best songs out today!
And it was VERY fitting!
Katy Perry would be so, so proud! Actually we're sure she she is! Because if she hasn't seen this by now - then that needs to be fixed ASAP!
Watch these cute champions dance, smile, and hear them Roar!!!
Check out the inspirational video (above) !!!