Talk about burning bridges!
Sara started the letter off as a sort of breakup with the company saying:
[Image via People.]
The lovely First Lady is stopping by the NBC staple for a third time on Monday, August 13 and is expected to chat about the 2012 Summer Olympics and life at the White House.
Since the presidential election is rapidly approaching and it's a close race, this might be the last chance she gets to talk about living there on late-night TV while her hubby, Barack Obama, is still in office.
[Image via Ramey Pix.]