Celebs to sing 'What the World Needs Now' at Dem convention

An eclectic mix of celebrities — including Debra Messing, Broadway star Idina Menzel, Darren Criss of "Glee" and "Spin City" actor Richard Kind — is taking to the stage at the Democratic National Convention in Philadelphia to perform "What the World Needs Now Is Love."

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ITK eyed the group rehearsing for the number on Wednesday to applause from some delegates gathered in the audience.

Last month, several Broadway veterans banded together to record a version of the 1965 tune to benefit victims of the shooting at an Orlando, Fla., gay nightclub.