i discovered the gregory brothers‘ videos not long ago and i’m still amazed by the idea and the funny results. it seems quite simple: they take famous youtube videos or news reports, make a fantastic musical base and autotune the voices appearing so it seems to be a real song.
below, one of the most famous pieces (you can watch the original news report here). they have also autotuned the typical charlie bit me (here) and made a fantastic collaboration with weezer (this one kicks asses!)
much more in their youtube channel.