These guys are bad ass. Classical musicians from Australia doing modern-meets-classical covers of pop songs. Check out their YouTube for all of their videos.

This one is by far my favorite... Rude Boy by Rihanna. They make it sound so epic. It would be good in a movie. Very cinematic.

Telephone by Lady Gaga ft. Beyoncé

I like the video for this one the best because they're in front of an old fashioned carousel... Bulletpoof by La Roux