To promote Rhode's new Peptide Lip Shape, Hailey Bieber starred in the viral launch's campaign in nothing but a sweater and granny panty underwear.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links."

While a dewy skin look is non-negotiable, Hailey also confesses that she does “a lip combo every single day” to make her lips look fuller. Using the Peptide Lip Shape, the basis of her technique is to circle and define.