all the time, the amen break being the obvious one, used in loads of things.
my friends put out a sample cd years ago.. and it's used in a uk tv show road wars a lot. it's funny how much it's used. bought the arturia fairlight recently, and loads of the samples have been used in 80's music.
the proteus sound modules I got ages ago, were well used years earlier
because the music I'm into , a lot is sampled from elsewhere like films etc. well used to be moreso.. so you watch a film , then it clicks.. "who sampled" will show you a lot of where stuff comes from.
tv "library music" is interesting, as sometimes it turns up in different shows.
this turned up in 2 tv shows.. one had to change it. "give us a clue" and "grange hill" in the UK being the one most will know.