Orlando Riva Sound (commonly abbreviated as O.R.S.) was a German disco group founded in 1977 by Anthony Monn and Rainer Pietsch.
In 1979, the group got 5th place in the competition to represent Germany in the Eurovision Song Contest with "Lady, Lady, Lady". That year, they also had another hit with the song "Indian Reservation", a cover of Paul Reverbe & the Raiders.
Their final success came in 1981 with "O.T.T. (Over The Top)" after which the band broke up.