Kind of a song challenge... (title to the tune of O Donna from Hair, of course.)

I find myself going through every day with a "this is the last Saturday Obama will be president" "this is my last chance in a hot tub while Obama is still president" - I'm saving my favorite section of the Sunday paper for after my last mah-jongg game of the Obama presidency...

So we need a song that honors the legacy. Can y'all help? Paeans, odes, etc. Let it be shiny.