Ariana Grande didn’t need a bubble to float in — just a Bob Mackie.

The multi-hyphenate star, 32, wore a strapless gown from the legendary designer’s Fall/Winter 1997 collection for “Wicked: One Wonderful Night,” the NBC concert special celebrating the upcoming release of “Wicked: For Good.”

The champagne-colored confection had a fitted bejeweled bodice with a sweetheart neckline that flared into a voluminous tulle skirt, creating a silhouette worthy of Glinda the Good Witch herself.

She paired the archival treasure with a diamond choker and a sleek ballet bun, wrapping a coordinating champagne satin safety harness around her waist for her airborne entrance into the Dolby Theatre in Los Angeles.

Her gown has quite the Hollywood pedigree: Fran Drescher originally wore the same dress in

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