In Les Miserables, the new movie, the actors are seen singing (like in a musical). Can you name a movie which you would have liked to be a musical movie?

And can you say which two (or more) actors would sing what lines to each other?

HEAT
“Vincent Hanna/Pacino: So you never wanted a regular type life?”
“Neil McCauley/De Niro: What the fuck is that? Barbeques and ballgames? ”