This is like seeing a unicorn! WOW!
U2 had a special treat for fans during their concert in Seattle on Sunday night (May 14th) when they were joined on stage by Pearl Jam frontman Eddie Veddar and Mumford & Sons.
They joined the veteran Irish band for a special Mother's Day performance of the song "Mothers of the Disappeared," which is track from U2's blockbuster 1987 album "The Joshua Tree".