Hubba Hubba What?
Yes, that is the name of the Think Tank Hubba Hubba Hiney, which is a small camera bag suitable for a Compact System Camera, such as a Sony NEX, M4/3 or Nikon 1 system. This bag is large enough that it can hold a Compact System Camera, several lenses, and other accessories such as a flash and battery charger. The bag is also large enough that you can carry a 70-200mm f/2.8 lens horizontally, or even a DSLR with a modest lens attached.
I often use this bag to get the contents to the stateroom on a cruise ship, then offload everything but the Nikon V1 camera and lens I am using. As I often use a DSLR 70-300mm lens with this camera (by using the Nikon FT-1 adapter), the bag will even fit the camera with the lens attached.
So I take two bags? Yes. My larger bag (Think Tank Speed Freak) carries my DSLR gear, and this Hubba Hubba Hiney carries my Nikon V1. I typically shoulder carry the Speed Freak on board, and the Hubba Hubba Hiney is small enough to pack inside of my 20" carry-on suitcase.
Of course, your needs may differ, and if you only carry a Compact System Camera, you may wish to shoulder carry this bag. Even fully laden with a Nikon V1 and lenses, this bag only weighs 4lbs full.