Question: What American actress, singer, and songwriter stars alongside Josh Gad, Kristen Bell, and Jonathan Groff in what upcoming 2017 American 3D computer-animated holiday-themed musical fantasy featurette short film?
{'answer': 'Idina Menzel', 'supporting_facts': [["Olaf's Frozen Adventure", 0], ["Olaf's Frozen Adventure", 1], ['Idina Menzel', 0]]}