But in all this research, one thing has stumped us: The secret behind her smudge-proof red lip. It's survived swag surfin', chicken fingers (with "seemingly" ranch dip!) and several pink beverages.

The ones below stand out as the absolute best — from famous reds like M.A.C’s Ruby Woo to newer favorites like Fenty’s Stunna Lip ... hot pink to lilac blue, so even if Always Red isn ...