It was performed in the film by Minnie Driver, it was performed at the Oscars by Beyonce, as was every Oscar-nominated song that had female vocals in it.
Josh Groban got to sing his Oscar-nominated song that night (with Beyonce, of course), but not Minnie Driver.
In 2005, “Learn to be Lonely” from The Phantom of the Opera was nominated for Best Original Song.
There certainly have been cases where performers have been clearly passed over for one reason or another.