Bono made a surprise appearance just outside Coachella on Friday night, joining Belgian-Congolese artist Baloji for an impromptu performance at a ranch in La Quinta, California near Indio. The collaboration took place at the Rolling Stone Rock Room launch party for Diesel+Edun's Studio Africa, a series of events bringing African and Western musicians together.
Nice catch I think Bono is gradually losing his excellent ear though... I've noticed it in some of the last vids that have surfaced in recent times. He seems to have quite a hard time to sing perfectly in tune.
I mean that I've noticed some difficulties and some slight off-tune singing. I know singing along to kareokes or orchestras is quite difficult, and even more when it's a swing/jazz song, that use to have seventh and diminished chords that make even harder to sing in tune. His vocal strength and stage pressence are still superb though.