Jon Hamm continues to be the greatest human being on the planet. During a surprise appearance at Bonnaroo Saturday, Hamm joined Zach Galifianakis in leading the crowd in a rendition of “We Are the World,†according to Pitchfork. Hamm also fed Galifianakis some gummy bears at the festival’s comedy tent, which enticed Belle and Sebastian’s Stuart Murdoch, who subsequently asked Hamm to feed him some gummy bears too. Hamm obliged him. Watch Hamm sing, and feed people gummy bears, below: