MAC Who's That Chick is a very warm-toned, dark orange with a frost finish. It is a limited edition lipstick that retails for $19.00 and contains 0.1 oz.
Who's That Chick Lipstick ($16.50 for 0.10 oz.) is described as a "mid-tone orange with frost [with a Frost finish]." It's a brightened, medium orange with lighter tangerine orange shimmer and a frosted, partially metallic finish. It had semi-opaque color coverage where the shimmer seemed to cover everywhere, but there was some translucency. This shade had a very creamy, emollient consistency. The shimmer is really what makes this different than other orange lipsticks, as the shimmer is at the forefront and gave the overall color a lighter look. It lasted two and a half hours on me--it almost felt like it just slipped right off because of how creamy (but thin) it was! It didn't seem drying or hydrating during that short period it was on for. MAC Tart & Trendy is less shimmery. Milani Sweet Nectar is less shimmery, darker. MAC Sounds Like Noise is less shimmery, lighter. OCC Electric Grandma is pinker. See comparison swatches.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.
Formulated to shade, define and showcase the lips, M·A·C Lipstick is available in every nuance of your favorite color and high-fashion texture. It's the iconic product that made M·A·C famous. AMPLIFIED CREME (A): Ultra-creamy. Quietly shiny. Color-packed! Hi-res: hi-impact. CREMESHEEN (C): Creme-based lipstick that imparts bright full color, with a soft and supple shine. FROST (F): Excellent color payoff with medium to high frosted shimmer-and-shine finish. LUSTRE (L): Demi-sheer with wet-look lustre finish. Very slick. Makes lips look soft, smooth, ultra-moist. MATTE (M): Pigment rich with intense color pay-off. No-shine, all matte finish. SATIN (S): Color-rich. Soft satin, semi-matte finish. Conditions while adding intense color.