Here's my selection (all available on Youtube)

https://www.youtube.com/watch?v=TeLC48nFc3Q

https://www.youtube.com/watch?v=S23VK1v9dB8

https://www.youtube.com/watch?v=2Qs1J612nZs

These all have one thing in common - they're covers of well-known songs, the first two video'd live. But have a listen before you judge too quickly - they each have several million views, which doesn't happen by accident. And, as a bonus question, what's 'wrong' about the third one?