You too can have a body like mine : a novel / Alexandra Kleeman.

Enhanced descriptions from Syndetics:

An intelligent and madly entertaining debut novel reminiscent of The Crying of Lot 49, White Noise, and City of Glass that is at once a missing-person mystery, an exorcism of modern culture, and a wholly singular vision of contemporary womanhood from a terrifying and often funny voice of a new generation.

A woman known only by the letter A lives in an unnamed American city with her roommate, B, and boyfriend, C, who wants her to join him on a reality show called That's My Partner! A eats (or doesn't) the right things, watches endless amounts of television, often just for the commercials--particularly the recurring cartoon escapades of Kandy Kat, the mascot for an entirely chemical dessert--and models herself on a standard of beauty that only exists in such advertising. She fixates on the fifteen minutes of fame a news-celebrity named Michael has earned after buying up his local Wally Supermarket's entire, and increasingly ample, supply of veal.

Meanwhile B is attempting to make herself a twin of A, who hungers for something to give meaning to her life, something aside from C's pornography addiction, and becomes indoctrinated by a new religion spread throughout a web of corporate franchises, which moves her closer to the decoys that populate her television world, but no closer to her true nature.