Who: Selena Gomez.
When: Friday, May 6.
Where: The opening night of her Revival Tour in Las Vegas, Nevada.
What: A silver slip dress by Galvan.
Why: The slip dress is forever, and Galvan does it best. With a daring high slit and plunging neckline, Gomez's Galvan gown is Las Vegas nightclub-perfect, embracing our favorite '90s trend with a metallic glow.
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