Lindsey Stirling & Pentatonix (Radioactive)

So my cousin just introduced me to this new song called Radioactive. But it's not sung by the original artists 'Imagine Dragons', it's a cover of the song by Lindsey Stirling and Pentatonix! Here's the video.

So this is my first time hearing about Lindsey Stirling but she is amazing! She also did covers for Assassin's Creed's theme song. I can't believe she likes Assassin's Creed! That is so AWESOME! 

Here is another one of her videos, it's dubstep so if you hate it I recommend you don't listen to it.