Jubilantly adv. : In a jubilant manner.

Example:
*Runs about town Jubilantly* Have you heard? Have you heard the glorious news?

Taxonomy
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Defination from the web:
jubilantly exploited this utterance, scattering it broadcast over San Francisco in tens of thousands of paper dodgers. ... Having written jubilantly home to the Secretary of State that his mission had succeeded, he was now faced with the necessity of ...