Three stars because this is a bit better than the fifties version that we watched a couple of months ago.
It's the same story, with tighter telling, slightly better songs, and seventies fashions.
Here, both the fading male star and rising woman are singers. not actors, but that doesn't make much difference. The ending is more ambiguous, but not much more.
And it does a good job of showing the negative side of fame. I quite enjoyed it.