Korean rap band Big Bang’s cover of “This Love” by Maroon 5. Have no idea what the heck they’re singing about but it’s pretty catchy. And different enough from the original while still retaining the basic tune.
A very interesting version of “Total Eclipse Of The Heart” (which is a song permanently made for interesting videos) done by Only Men Aloud (feat. Bonnie Tyler) and a whole elaborate set of legos.