Who: The Korean-born, NYC-based photog behind I’m Koo.
Known for: Photographing fashion’s most famous faces — with a special knack for gorgeous head-and-shoulders shots.
Where to find him: Getting in the grill of everyone from Marc Jacobs to Vika Gazinskaya (let those other photogs scuffle for the shoe shot).
What to wear: Anything from Phillip Lim leather overalls to '90s throwback gear — don’t worry, if you’re stylin’, Youngjun’ll find you.
Photo: Courtesy of Le 21ème.