Judy was solid. You're right though, it was mainly a platform for Renée Zellweger. I learned a lot about Judy Garland though. It's worth a rental for sure.
Anna and the Apocalypse was okay. I applaud them for doing something different. Killing zombies and then breaking into song is not something I've ever seen before. Some of the songs are actually really well done, but I thought it could have been infused with a little more Christmas stuff.