Macklemore & Who? Fans Can't Recognize Ryan Lewis on 'Fallon'

Ryan Lewis and Jackie Ganger attend the 56th GRAMMY Awards at Staples Center on January 26, 2014 in Los Angeles, CA

Christopher Polk/Getty Images for NARAS

John Oates, Art Garfunkel and Chad Hugo would understand

Pop quiz: What exactly does Ryan Lewis do?

Those who have been paying attention to popular music over the past year and a half should at least have some idea that he's a producer associated with the very, very successful rapper Macklemore. But Jimmy Fallon wasn't so sure. So he sent the real Ryan Lewis out on the town to see for himself on last night's episode of "The Tonight Show."

More Macklemore & Ryan Lewis:

Lewis stays in good spirits as a number of twenty-somethings profess to be fans of Macklemore and hip-hop, but can't figure out what exactly he did in the duo.

Says one gentleman, "Don't really know what he does; he's like a package deal. He comes with Macklemore a lot."

Another guy surmises Lewis is working onstage with "computers and whatnot."

One girl can't recognize Lewis, even when he shows her a photo of him posing with Macklemore.

John Oates, Art Garfunkel and Chad Hugo would understand.

At least Lewis gets one girl to say he was more attractive than his more famous counterpart.