LESLIE DAVID BAKER is the actor who plays miserable, middle-aged Stanley Hudson on "The Office".  And apparently as a joke . . . but not definitely . . . he's released a debut SINGLE.  It's called "2 Be Simple", and there's a music video for it where he wakes up in bed with two models . . . throws a huge pool party at his house . . . then wakes up again and realizes it was all a dream.