In reaction to my short solo thing, let's talk about one note solos and songs or songs in one chord.
One note solos: I guess there are plenty of those around, Niel Young's "Cynnamon girl", Lindsey Buckingham on Fleetwood mac's "The chain", Pete Townshend on "I can see for miles" name them.
One note songs.
http://www.youtube.com/watch?v=hO7uBSY-znY
"Early to bed" by the GREAT band Morphine.
One chord songs:
Plenty of those, Talking Heads for example "Girlfriend is better" and "Once in a lifetime" Or the Beatles' "Tomorrow never knows"