U218 Singles is a greatest hits album by Irish rock band U2, released in November 2006. The album contains 18 songs: 16 of their most successful and popular singles, and two new songs. The 17th track is a cover version of The Skids' "The Saints Are Coming", recorded with Green Day to benefit Hurricane Katrina charities. The 18th and closing track was a new song entitled "Window in the Skies". Despite not being released until November 2006, it was the seventh-highest-selling album in the world that year.