Watch Ariana Grande effortlessly perform a hilarious surprise song about being very, very tiny on late night: 'I am a human ...
The Oscar-nominated singer/actress also talked about "Wicked" and her intense training to play Glinda on Wednesday's (Feb. 5) ...
Jimmy Kimmel started off his interview with Ariana Grande by asking the Wicked star to sing a song she's never seen before.
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