Saw this during American Idol Finale, its the american idol version of 'Gladys Knight and the Pips' performing Midnight Train to Georgia.
Basically the three characters made up of Robert Downey, Jr Ben Stiller and Jack Black created a comedy version of 'The Pips' performance in year 1973. This video is so clever and hilarious..
The original version of 'The Pips'. Watch those smooth moves.