Lorde performs a private show for Hilary Duff, Anna Kendrick, and Ashley Benson at Soho House for the Delta Toasts the Grammys event; Rita Ora, Paul Oakenfold, and Iggy Azalea attend the Friends 'N' Family 17 Grammy VIP Dinner; Lady Gaga, Heidi Klum, and Joe Jonas celebrate Arthur Fogel at Chateau Marmont—with the Grammys around the corner, check out where music world A-listers were out getting pumped for Sunday in this edition of Last Night's Parties.
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