Epix only uploads tiny pieces of this for viewing but someone has uploaded their whole Best Actress roundtable. The Supporting Actress version was up briefly before being pulled so watch it while you can. Starring: Jennifer Aniston, Emily Blunt, Shailene Woodley, Gugu Mbatha-Raw, and Jessica Chastain.
They talk for about 10 minutes at the beginning about singing and musicals -- someone needs to cast Gugu in a traditional musical straightaway!
UPDATE: Though the special presentations are not available in full for embedding, you can see all five of them here at the Epix site.