Ring the alarm!

Olivia Wilde looked smokin' hot in flaming red lipstick at the Fresh Air Fund Salute to American Heroes event in New York City last night. The 27-year-old "House" star paired her bold lips with a flawless face, shimmering lids and soft cat-eye.

Loving Wilde's lip color?

Watch the video below for pro tips on choosing the right siren shade of lipstick for your skin tone.