In 2007 , Idina Menzel re-recorded `` Defying Gravity '' as music.track_contribution solo version and released it as a single .

In week eight of the show , Barks performed `` Defying Gravity '' from the musical `` Wicked '' and in the week leading up to the show she was music.track_contribution support from American actress Idina Menzel who achieved fame for her performances as Elphaba , the Wicked Witch of the West in `` Wicked '' .