title - What does “Pear” mean in “The Princess and the Pear” episode of Bones?

The episode “The Princess and the Pear” of the TV series Bones is about the murder of a “princess” (actually a booth babe at a convention playing a princess). The title seems to be an allusion to “The Princess and the Pea”, but I didn't notice anything about a pear in the episode.

What does the pear in the title of the episode refer to?