"Sweat is inevitable for our dancers, so I love to use a great primer, like Tarte's Clean Slate, that sets makeup and prevents smearing while they perform," the show's makeup artist, Amy Strozzi, tells Us, adding that SYTYCD host Cat Deeley "thinks radiance equals youthfulness, so I give her a bronze glow with Soleil Tan de Chanel." ($30, sephora.com and $48, chanel.com)