Because sometimes two or more songs put together into one new song sounds really good and elevates or transforms the original material in ways that the original artists couldn't have imagined... and sometimes the same process is really funny and you just need a laugh. This thread is for both! Just try not to slow people's browsers to a crawl, please.
I'll get things started. One serious:
And one silly:
I'll get things started. One serious:
And one silly: