Thanks to commenter dbiloo who was able to tell me that Jon Hamm will host SNL January 30.
I was able to confirm this via an interview Jon did with Comedy Death Ray Radio.
Get ready for musical guest -
So let's recap
January 9 - Charles Barkley/Alicia Keys
January 16 - Sigourney Weaver/Ting Tings
January 30 - Jon Hamm/Michael Buble
The last episode must be a suave charmer special.