Hilary Duff naturally shines on stage. But she's also using an affordable tanner to boost her glow during her world tour. The singer has been looking positively radiant on every stop so far, and she didn't go on a lengthy tropical vacation before stepping back into the spotlight. Duff's makeup artist, Kelsey Deenihan, shared with Us that the makeup routine extends below the neck. She applies the Luna Bronze Instant Bronzing Cream to Duff's shoulders, collarbones, arms and legs "to instantly even tone and add smooth, bronze dimension.