Hailey Bieber’s golden bustier wasn’t the only thing dazzling on the Met Gala red carpet .

While her art-inspired royal blue and gold Saint Laurent ensemble had its moment, she topped off the look with a lacquered, slicked-back hairstyle with a finish so precise, it bordered on liquid,

Hailey Bieber used several Ouai products for her glossy Met Gala updo. Getty Images for The Met Museum/Vogue

The secret weapon behind it? None other than Ouai’s cult-loved hair oil , a versatile, under-$35 formula.

“Hailey’s look is all about balance; it’s structured, but still soft,” Bieber’s hairstylist, Irinel de Léon , shared in a press release of the “goddess” look.

Ouai Hair Oil

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“The dress has a strong silhouette and presence, so we wanted the hair to feel clean, pulled back and really intentional,” she added.

The formula earns its place in the glam room for a reason.…