Ryan Lewis works with Mackelmore and has four Grammy awards under his belt, but not everyone knows who he is. In a segment for NBC's "Tonight Show Starring Jimmy Fallon," Lewis approached fans asking about Ryan Lewis, who had no idea they were actually talking to him!

"His music is really genuine," a fan said. "I don't really know what he does. I know he's a package deal though. He comes with Macklemore a lot."

"I thought he was a producer," another one added. "It seems he was doing something with computers."

Lewis also held up a picture of him with Macklemore, asking fans to identify him and rate his appearance. Watch the hilarious video below!

The award-winning artist revealed in April his mother, Julie Lewis, has HIV, and founded the 30/30 project. They want to raise money for HIV-ridden communities over the next 30 years, hence the second "30" in the title. The first "30" represents Julie's 30 year battle.

"I was infected with HIV 30 years ago," Julie revealed in a video for the project. "I never thought that 30 years later, I would be sitting here talking to you."

"I want to do something big," she says. "The 30/30 Project is that big idea."

Her son adds, ''To honor the 30 years my mom has been a survivor, our family is raising funds to build health centers worldwide that will stand strong for at least 30 years. We're calling it the 30/30 Project.''

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