They are ALL singing live; with the Piano playing in their ears,
which will be replaced by a 70 Piece Orchestra.
It's up to the Director to decide which is the best take.
They are all ORGANICALLY IN the scenery as they're Singing...rain, war, etc....
Listen to Hugh Jackman..."I just have to worry about Acting"
I'm with Ann Hathaway...DON'T GO for "the pretty version" of your Song.
"...What comes with this way of working is you get a fragility of a Voice,
which matches with what the Character is saying"
http://www.youtube.com/watch?v=wwgQjfg0 ... r_embedded
- not to mention incredibly talented).