Imho, these pictures could of very well been staged by CA's team. Not only does it provide $ to CA, but it proves that people are still "interested" in her, an experiment of sort to prove to networks, bidders, etc that CA still is "selling" and that we are still interested in her. These pictures are all over the web, TMZ is getting hits, generating interest.
Don't let the pounds throw you off, high calorie Starbucks drinks and a laid back lifestyle could very well add on the pounds in 3 weeks, CA has a tiny build, it does not have to be a significant amount of weight to show, considering it looks like it all went to her midsection.