What number of studio album release did U2's Innocence + Experience Tour support?
Innocence + Experience Tour The Innocence + Experience Tour (styled as iNNOCENCE + eXPERIENCE Tour) was a worldwide concert tour by rock band U2. Staged in support of the band's 2014 album "Songs of Innocence", the tour visited arenas throughout 2015. It was U2's first time playing arenas since 2005–2006 on their Vertigo Tour. Comprising two legs and 76 concerts, the Innocence + Experience Tour began on 14 May 2015 in Vancouver, Canada. It visited North America from May through July, and Europe from September through December. Shows were predominantly booked in pairs for each market.
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".