MIT Resonance

Resonance is a student a cappella group at MIT that sings and performs skits. Their songs are fun and funny covers of pop songs with faithfully reproduced from vocals to instruments as a cappella songs.

Here's a couple videos from their web page (and the original songs for comparison). Check them out. :)

Killers - Mr Brightsides

Resonance cover - The original

Maroon 5 - Harder To Breathe

Resonance cover - The original