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A statement released by the band's label said: 'Unfortunately, due to the nature of Malcolm's condition, he will not be returning to the band.'
Taylor Swift and Metallica are set for the US debut of the Rock in Rio music festival next year. No Doubt, Linkin Park, The Deftones and John Legend also will perform.
Jazz pianist and singer Diana Krall has announced she is canceling her U.S. fall tour to give herself time to recuperate from a severe case of pneumonia.
Do you think that there are too many music festivals running today?