I personally dont think that the bear is photoshopped.

I saw a larger pic of it and it looks like the woman ( who may be five feet tall and weigh 120lb) is standing on the other side of the bear. I do believe that it is being held up by the strap under the arms as well. Just a poor photo to judge size by.
Here is a pic of a 727lb bear shot in WI this year. 80" nose to base of tail. Granted the hunter is probably pushing 300lb. Note: the bear is laying on a 4x8 sheet of plywood