Jimmy Fallon, Idina Menzel Sing ‘Let it Go’ [VIDEO]Jimmy Fallon, Idina Menzel Sing ‘Let it Go’ [VIDEO]Jimmy Fallon has found brilliance once again. This time Fallon created a great piece with Adele Dazeem, Idina Menzel and The Roots, all performing the hit song 'Let it Go' from the movie 'Frozen.'Dennis and JudiDennis and Judi