Oscar Performances 2013: Numbers from Chicago, Dreamgirls, and Les Miserables

Continuing tonight's theme on music in movies, the cast of "Chicago" performed "All That Jazz" Jennifer Hudson belted out a rousing "And I'm Telling You I'm Not Going" from "Dreamgirls" and the cast of "Les Miserables" joined for one last time to sing "One Day More".  The last number from Les Miserables was as full-sounding as a Broadway number.  Is this a miniature Broadway show or a movies award show?  Either way, I do enjoy the music.