Al Green's "Let's Stay Together" was downloaded 16,000 times last week, thanks in part to President Obama's a capella moment at the Apollo Theater last week.  According to Soundscan and MSNBC, that's the best sales week for the song since 2003. Of course, there's no "President Obama told me to download this song" option when you hit purchase on iTunes or your music provider of choice, but you have to assume that the viral videos (below) of the president singing the first bar of this legendary Al Green hit (one video has nearly 4 milllion views), has a lot to do with those great numbers.