African styles and Western pop can work well together, as shown by the impromptu experimental fusions at Africa Express. But what's needed is bravery and innovation, two qualities sadly lacking on this patchy, if occasionally entertaining tribute set. Despite the impressive cast, the result is pleasantly respectful rather than inspired, and there is far less passion and excitement than on the original U2 recordings. Angélique Kidjo provides a pleasantly cool, French-language version of Mysterious Ways, Ba Cissoko offers a laid-back, soulful Sunday Bloody Sunday (with kora backing), Tony Allen adds a predictably classy if never exhilarating Where the Streets Have No Name, and Keziah Jones does himself no favours with a light, funky and forgettable treatment of One. Only two tracks stand out: Soweto Gospel Choir's gutsy, unaccompanied Pride (In the Name of Love), and Vieux Farka Touré's transformation of Bullet the Blue Sky into a slinky, insistent guitar-blues workout.