Oh I love this! I favourited it when I found it a few months back because I thought it was so .
I have the Superman theme as my cell phone's alarm tone, so I frequently find myself humming 'and I know that you can see my underwear' over breakfast in the mornings!
Both of these videos are great! I thought the guy was really buff in the Superman video until I looked close at the suit - he's wearing inflatable muscles under his outfit.