Christina Aquilera really shows off her vocal chops in this music video from the movie, going from a low "growl" to the really high notes.

It's setting is just Christina and a jukebox in an empty bar with her singing "It Must Be Love" in an R&B style. Pretty good stuff.

https://www.youtube.com/watch?v=nl6qN9Uga-4

I'll catch the movie when it hits Netflix, but it looks entertaining. It's interesting to note the reviews at Rotten Tomatoes give it 32% based on 90 "professional" reviews, but the audience gives it 81% based on 15,719 reviews.

The movie would probably have done better if the producers had picked someone besides Cher for the part of the "aging singer", since Cher can no longer make a facial expression after all the botox and surgery. Christina is getting pretty high marks for her part though.