Idina Menzel on the Comedy Central stand-up program, "Tompkins Square" - originally aired on November 2, 1996 when she was still appearing on Broadway in RENT
She guests as an audience member who heckles host Jeff Ross during his opening monologue. In response to his bad singing, she stands up to show him how to REALLY sing "Twinkle, Twinkle Little Star." OLD-SCHOOL IDINA.
NOTE: Check out current husband/then-castmate, Taye Diggs, sitting next to her in the audience. =)
Video property of Comedy Central, courtesy of Idina-Here.com.