This terrible but fun movie, available on Hulu, stars the two Coreys (Feldman and Haim) at the height of their powers. It also has Jason Robards, Harry Dean Stanton, and Piper Laurie.
The movie is about Jason Robards transplanting his conciousness into the mind of Corey Feldman and then basically trying to convince Corey to get laid. It is also an excuss for Feldman to perfrom his classic Michael Jackson impression.
I remember loving this movie as a kid and it holds up in a way that only a HDTGM fan could appreciate. There are also some pretty great 5 star reviews on Amazon if your looking for a second opinion.