Ethan Hawke, backstage at The Bell House in Brooklyn, N.Y. Later, he would serenade Ask Me Another's winning contestant. Josh Rogosin/NPR hide caption

itoggle caption Josh Rogosin/NPR

Lake Street Dive members Bridget Kearney, Mike "McDuck" Olson, Mike Calabrese and Rachael Price (from left to right) battle it out in a '90s music-themed challenge. Josh Rogosin/NPR hide caption

itoggle caption Josh Rogosin/NPR

John Cameron Mitchell (right) and contestant Jordan Shavarebi celebrate a victory during their Ask Me Another Challenge. Josh Rogosin/NPR hide caption

itoggle caption Josh Rogosin/NPR

"Every time something pops in my head, I think twice about it and I do it anyway." - Gilbert Gottfried. Joe Scarnici/Getty Images hide caption

itoggle caption Joe Scarnici/Getty Images

John Linnell and John Flansburgh of They Might Be Giants might enjoy putting our contestants through the ringer a little too much... Steve McFarland hide caption

itoggle caption Steve McFarland