After Lady Gaga & Ariana Grande’s ‘Rain On Me,’ Which Other Superstars Still Need to Team Up?

On the new Billboard Pop Shop Podcast, the team discusses why -- in an era of wall-to-wall music collaborations -- Lady Gaga and Ariana Grande's "Rain On Me" has broken through the pop culture noise as an event record. Plus, the Pop Shoppers pontificate on what superstars they’d like to see team-up for a fantasy pairing.

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