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Ellen DeGeneres Radio

Just when you thought your Frozen fever broke and you were over "Let It Go," Ellen DeGeneres and Bridesmaids star Kristen Wiig have brought the song back in a whole new light.

Both Ellen and Kristen covered the viral song on "The Ellen DeGeneres Show" this week ... even though they don't know the lyrics! Well, they do now! 

Check out the hilarious video below: