Hams love to dress up as well-known characters or figures (that are human-sized).  They think this low-effort move puts them on par with the physicality of the character/figure they're mimicking, and that others around them are similarly fooled. That's why you see hams all the time at comic/movie conventions, dressed up as characters that are human-sized. It works to some extent too with diehard and low IQ fans (who lavish the fats with attention so they can pretend to be annoyed by it). Even at her lowest points, Britney Spears has always been relatively fit, something this ham will never achieve no matter how much money it spends on replicating the outfits.