U2

U2 is a well-known Irish rock band.

They guest starred in "Trash of The Titans" (Season Nine. This Episode would be known for it being the 200th Episode). Homer walks on stage in the middle of U2 concert, because he wants to tell the hip people of Springfield, why he would be a good Head or Garbage person. They latter made a cameo in In the Name of the Grandfather as a moving company.