Bono will appear on K'Naan's upcoming album, Country, God Or The Girl. HipHopDX says it'll be released on May 1st, but there's no information about what song(s) will involve Bono. Keith Richards, will.i.am and others are also listed as guests.
K'Naan joined U2 on stage last year in Minneapolis to sing "Stand By Me" in tribute to the famine victims in Somalia. Bono returned the favor by singing with K'naan last October at the Clinton Foundation benefit concert.