The episode, entitled "Ask Her More-a-Rooney," centers on Liv (Cameron), the actress of the Rooney family, who will star in a new TV show in season three.
While promoting the new show, Liv notices that her male co-star gets asked about his role and his work, whereas she only gets questions about beauty, fashion and other superficial things.
Bell will be appearing on a red carpet with Liv when they decide to "change the conversation" and prove that girls should be asked about more substantial topics, rather than the typical "Which designer are you wearing?" type of questions.
New episodes of Liv and Maddie air Sundays on Disney Channel.
Need even more reasons to love Kristen Bell? Take a look at the video below to hear the ridiculously sweet voicemail message she left as Anna from Frozen for a little girl with a brain tumor.