U2 stunned world music fans in London on Thursday night (28May09) when they took the stage during a Baaba Maal gig.
Bono and his bandmates joined the African artist for his O2 Academy Shepherds Bush concert as part of London's 50th anniversary celebration of Island Records.
The group, who are also Island artists, joined Maal for an encore of their One hit and then remained onstage for a rendition of Vertigo and Bob Marley's Feel Alright, according to NME.com.