OK GO is the band that does all those crazy music videos.  They did the treadmill one, the one with the Rube Goldberg machine, and more recently the one with a bunch of trained dogs.  And they just released another one on YouTube the other day.

For this one, they led a parade of 100 people through the streets of Los Angeles . . . and if you looked at it from above, the parade route spelled "OK GO".