Who is the frontman of rock band Imagine Dragons?

Dan Reynolds

In "Zombieland," what does Tallahassee obsessively search for throughout the film? In volleyball, how many hits per side are allowed before the ball must cross the net? What winter sport combines ballet and skiing? Who was the lead vocalist for Pearl Jam? Which U.S. city hosted the first World's Fair held in America in 1876, celebrating the country's centennial?