At the American Music Awards over the weekend, the pop star showed up almost completely fresh-faced. She and her makeup artist Etienne Ortega — who also does over-the-top glam looks for The Real Housewives of Beverly Hills' Erika Girardi — kept the focus on Aguilera's glowing skin. The no-makeup look included barely-there pink lipstick and a touch of shimmer eyeshadow.

So pretty! But the natural look is a shocker, considering how much Aguilera loves to play with makeup. Let's take a walk down memory lane of some of Aguilera's most iconic beauty looks, both from decades past and 2017: 

Who could forget Aguilera's "Dirrty" era, synonymous with crimped hair, hot pink extensions, and a smoky eye? 

Then she did the Marilyn Monroe-inspired retro glam thing for years. (Remember the "Candyman" music video?)

Aguilera usually doesn't shy away from a vampy lip or bronzer. 

Even today, she's still reaching for a dramatic lipstick. 

Or a good pair of false eylashes. 

This electric blue liner is so on trend in 2017.

We can't help but share her Halloween look from this year, because it is a sight to behold and possibly her most extreme beauty look ever. Even though the pop star switched it up and went for a subtle look last night, this costume really captures her inner sparkly unicorn.