I’ll put a warning on this one straight away: if you haven’t heard or seen Brett Domino yet, and you have a slightly off sense of humour (like I do), then I recommend you come back when you have a couple of hours spare. Once you’ve seen the videos below, you’ll want to get some more.
Quite aside from the brilliance of the idea, the ability to execute these medleys in the way they are, with the production values and attention to detail, is second to none.
I commend to you Brett Domino. First up, the Justin Timberlake Medley:
Second, a cover of Bad Romance: