I think you meant Berlin sued, not Gershwin for obvious reasons. Gershwin had no claim to Annie Get Your Gun - Berlin's baby. Esther Williams sued over the use of clips from her movies in That's Entertainment! too, despite it virtually resurrecting her deceased stardom. Finally, Porgy and Bess is the movie that remains in purgatory due to a 'rights' issue with the Gershwin estate.He was a fiercely litigious old man. I remember someone trying to screen the Judy Garland excerpts from Annie Get Your Gun publicly at a venue in the 70s and Gershwin sued to stop them from being shown claiming that they would somehow harm his legacy. By the time TE3 came out in the 90s he was long dead and the controllers of his estate had no issue at all with them being released in that compilation.