David Letterman-Michael Buble's Musical Top 10 & Al Gore 'Carbon Billionaire' [VIDEOS]

Check out this exclusive preview of tonight's "Top Ten Least Popular Musical Standards" as sung by the Grammy-winning singer.
Is Al getting rich from a book of delicious recipes?


David Letterman - Michael Buble Top Ten


David Leterman - Al Gore: Carbon Billionaire

(If any video or link is broken, please comment below, thanks!)