Invisible was a song later included as a hidden track on which thirteenth U2 album?
Invisible (U2 song) "Invisible" is a song by Irish rock band U2. Unveiled in a Super Bowl XLVIII television advertisement, it was available as a free digital download through the iTunes Store from 2–3 February 2014. Bank of America gave $1 for each download of the track to (RED), an organisation co-founded by Bono, to fight AIDS. Since 4 February, it has been available as a paid download, with all the proceeds also going to (RED). The song was later included as a hidden track on the deluxe edition of the group's 2014 studio album "Songs of Innocence".
13 (Blur album) 13 is the sixth studio album by English alternative rock band Blur, released on 15 March 1999. Jettisoning the Britpop sound of Blur's early career, "13" explores experimental, psychedelic and electronic music.